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Finding the Fourth Proportional to 66,773,694.12, 100,165,410.90 and 20,709,715.02

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Solution

The fourth proportional to 66,773,694.12, 100,165,410.90 and 20,709,715.02 is: 31,066,082.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,773,694.12 : 100,165,410.90 = 20,709,715.02 : x
  2. Step 2: Convert to fraction form
    66,773,694.12/100,165,410.90 = 20,709,715.02/x
  3. Step 3: Cross multiply
    66,773,694.12x = 100,165,410.90 × 20,709,715.02
  4. Step 4: Simplify right side
    66,773,694.12x = 2,074,397,114,600,201.75
  5. Step 5: Solve for x
    x = 2,074,397,114,600,201.75/66,773,694.12
  6. Step 6: Final answer
    x = 31,066,082.86

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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.