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Finding the Fourth Proportional to 71,518.52, 98,707.29 and 39,697.64

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Solution

The fourth proportional to 71,518.52, 98,707.29 and 39,697.64 is: 54,789.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,518.52 : 98,707.29 = 39,697.64 : x
  2. Step 2: Convert to fraction form
    71,518.52/98,707.29 = 39,697.64/x
  3. Step 3: Cross multiply
    71,518.52x = 98,707.29 × 39,697.64
  4. Step 4: Simplify right side
    71,518.52x = 3,918,446,463.80
  5. Step 5: Solve for x
    x = 3,918,446,463.80/71,518.52
  6. Step 6: Final answer
    x = 54,789.26

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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.