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Finding the Fourth Proportional to 64,387,761.60, 96,581,642.40 and 21,263,620.80

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Solution

The fourth proportional to 64,387,761.60, 96,581,642.40 and 21,263,620.80 is: 31,895,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,387,761.60 : 96,581,642.40 = 21,263,620.80 : x
  2. Step 2: Convert to fraction form
    64,387,761.60/96,581,642.40 = 21,263,620.80/x
  3. Step 3: Cross multiply
    64,387,761.60x = 96,581,642.40 × 21,263,620.80
  4. Step 4: Simplify right side
    64,387,761.60x = 2,053,675,420,234,802
  5. Step 5: Solve for x
    x = 2,053,675,420,234,802/64,387,761.60
  6. Step 6: Final answer
    x = 31,895,431.20

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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.