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Finding the Fourth Proportional to 71,488.35, 98,657.15 and 39,657.29

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Solution

The fourth proportional to 71,488.35, 98,657.15 and 39,657.29 is: 54,728.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,488.35 : 98,657.15 = 39,657.29 : x
  2. Step 2: Convert to fraction form
    71,488.35/98,657.15 = 39,657.29/x
  3. Step 3: Cross multiply
    71,488.35x = 98,657.15 × 39,657.29
  4. Step 4: Simplify right side
    71,488.35x = 3,912,474,516.55
  5. Step 5: Solve for x
    x = 3,912,474,516.55/71,488.35
  6. Step 6: Final answer
    x = 54,728.84

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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.