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Finding the Fourth Proportional to 81,654,501.60, 122,481,752.40 and 55,788,415.20

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Solution

The fourth proportional to 81,654,501.60, 122,481,752.40 and 55,788,415.20 is: 83,682,622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,654,501.60 : 122,481,752.40 = 55,788,415.20 : x
  2. Step 2: Convert to fraction form
    81,654,501.60/122,481,752.40 = 55,788,415.20/x
  3. Step 3: Cross multiply
    81,654,501.60x = 122,481,752.40 × 55,788,415.20
  4. Step 4: Simplify right side
    81,654,501.60x = 6,833,062,857,314,797
  5. Step 5: Solve for x
    x = 6,833,062,857,314,797/81,654,501.60
  6. Step 6: Final answer
    x = 83,682,622.80

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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.