Home / 81,587,999.80-122,381,999.70-76,801,094.20

Finding the Fourth Proportional to 81,587,999.80, 122,381,999.70 and 76,801,094.20

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Solution

The fourth proportional to 81,587,999.80, 122,381,999.70 and 76,801,094.20 is: 115,201,641.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,587,999.80 : 122,381,999.70 = 76,801,094.20 : x
  2. Step 2: Convert to fraction form
    81,587,999.80/122,381,999.70 = 76,801,094.20/x
  3. Step 3: Cross multiply
    81,587,999.80x = 122,381,999.70 × 76,801,094.20
  4. Step 4: Simplify right side
    81,587,999.80x = 9,399,071,487,344,072
  5. Step 5: Solve for x
    x = 9,399,071,487,344,072/81,587,999.80
  6. Step 6: Final answer
    x = 115,201,641.30

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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.