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Finding the Fourth Proportional to 81,654,328.80, 122,481,493.20 and 27,801,640.80

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Solution

The fourth proportional to 81,654,328.80, 122,481,493.20 and 27,801,640.80 is: 41,702,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,654,328.80 : 122,481,493.20 = 27,801,640.80 : x
  2. Step 2: Convert to fraction form
    81,654,328.80/122,481,493.20 = 27,801,640.80/x
  3. Step 3: Cross multiply
    81,654,328.80x = 122,481,493.20 × 27,801,640.80
  4. Step 4: Simplify right side
    81,654,328.80x = 3,405,186,478,594,042.50
  5. Step 5: Solve for x
    x = 3,405,186,478,594,042.50/81,654,328.80
  6. Step 6: Final answer
    x = 41,702,461.20

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.