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Finding the Fourth Proportional to 71,489.85, 98,659.22 and 39,658.79

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Solution

The fourth proportional to 71,489.85, 98,659.22 and 39,658.79 is: 54,730.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,489.85 : 98,659.22 = 39,658.79 : x
  2. Step 2: Convert to fraction form
    71,489.85/98,659.22 = 39,658.79/x
  3. Step 3: Cross multiply
    71,489.85x = 98,659.22 × 39,658.79
  4. Step 4: Simplify right side
    71,489.85x = 3,912,704,595.95
  5. Step 5: Solve for x
    x = 3,912,704,595.95/71,489.85
  6. Step 6: Final answer
    x = 54,730.91

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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.