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Finding the Fourth Proportional to 66,999,387.20, 100,499,080.80 and 56,039,892.80

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Solution

The fourth proportional to 66,999,387.20, 100,499,080.80 and 56,039,892.80 is: 84,059,839.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,999,387.20 : 100,499,080.80 = 56,039,892.80 : x
  2. Step 2: Convert to fraction form
    66,999,387.20/100,499,080.80 = 56,039,892.80/x
  3. Step 3: Cross multiply
    66,999,387.20x = 100,499,080.80 × 56,039,892.80
  4. Step 4: Simplify right side
    66,999,387.20x = 5,631,957,714,530,538
  5. Step 5: Solve for x
    x = 5,631,957,714,530,538/66,999,387.20
  6. Step 6: Final answer
    x = 84,059,839.20

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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.