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Finding the Fourth Proportional to 71,513.82, 98,686.08 and 39,680.82

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Solution

The fourth proportional to 71,513.82, 98,686.08 and 39,680.82 is: 54,757.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,513.82 : 98,686.08 = 39,680.82 : x
  2. Step 2: Convert to fraction form
    71,513.82/98,686.08 = 39,680.82/x
  3. Step 3: Cross multiply
    71,513.82x = 98,686.08 × 39,680.82
  4. Step 4: Simplify right side
    71,513.82x = 3,915,944,576.99
  5. Step 5: Solve for x
    x = 3,915,944,576.99/71,513.82
  6. Step 6: Final answer
    x = 54,757.87

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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.