Home / 81,657,115.10-122,485,672.65-21,072,841.10

Finding the Fourth Proportional to 81,657,115.10, 122,485,672.65 and 21,072,841.10

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Solution

The fourth proportional to 81,657,115.10, 122,485,672.65 and 21,072,841.10 is: 31,609,261.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,657,115.10 : 122,485,672.65 = 21,072,841.10 : x
  2. Step 2: Convert to fraction form
    81,657,115.10/122,485,672.65 = 21,072,841.10/x
  3. Step 3: Cross multiply
    81,657,115.10x = 122,485,672.65 × 21,072,841.10
  4. Step 4: Simplify right side
    81,657,115.10x = 2,581,121,116,780,066
  5. Step 5: Solve for x
    x = 2,581,121,116,780,066/81,657,115.10
  6. Step 6: Final answer
    x = 31,609,261.65

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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.