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Finding the Fourth Proportional to 71,328.94, 98,432.72 and 39,497.15

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Solution

The fourth proportional to 71,328.94, 98,432.72 and 39,497.15 is: 54,505.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,328.94 : 98,432.72 = 39,497.15 : x
  2. Step 2: Convert to fraction form
    71,328.94/98,432.72 = 39,497.15/x
  3. Step 3: Cross multiply
    71,328.94x = 98,432.72 × 39,497.15
  4. Step 4: Simplify right side
    71,328.94x = 3,887,812,251.57
  5. Step 5: Solve for x
    x = 3,887,812,251.57/71,328.94
  6. Step 6: Final answer
    x = 54,505.40

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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.