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Finding the Fourth Proportional to 71,149.59, 98,178.75 and 39,314.16

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Solution

The fourth proportional to 71,149.59, 98,178.75 and 39,314.16 is: 54,249.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,149.59 : 98,178.75 = 39,314.16 : x
  2. Step 2: Convert to fraction form
    71,149.59/98,178.75 = 39,314.16/x
  3. Step 3: Cross multiply
    71,149.59x = 98,178.75 × 39,314.16
  4. Step 4: Simplify right side
    71,149.59x = 3,859,815,086.10
  5. Step 5: Solve for x
    x = 3,859,815,086.10/71,149.59
  6. Step 6: Final answer
    x = 54,249.29

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1.5x scale

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.