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Finding the Fourth Proportional to 71,529.72, 98,704.62 and 39,699.42

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Solution

The fourth proportional to 71,529.72, 98,704.62 and 39,699.42 is: 54,781.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,529.72 : 98,704.62 = 39,699.42 : x
  2. Step 2: Convert to fraction form
    71,529.72/98,704.62 = 39,699.42/x
  3. Step 3: Cross multiply
    71,529.72x = 98,704.62 × 39,699.42
  4. Step 4: Simplify right side
    71,529.72x = 3,918,516,165.32
  5. Step 5: Solve for x
    x = 3,918,516,165.32/71,529.72
  6. Step 6: Final answer
    x = 54,781.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.