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Finding the Fourth Proportional to 71,489.39, 98,650.71 and 39,658.21

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Solution

The fourth proportional to 71,489.39, 98,650.71 and 39,658.21 is: 54,725.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,489.39 : 98,650.71 = 39,658.21 : x
  2. Step 2: Convert to fraction form
    71,489.39/98,650.71 = 39,658.21/x
  3. Step 3: Cross multiply
    71,489.39x = 98,650.71 × 39,658.21
  4. Step 4: Simplify right side
    71,489.39x = 3,912,310,327.20
  5. Step 5: Solve for x
    x = 3,912,310,327.20/71,489.39
  6. Step 6: Final answer
    x = 54,725.75

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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.