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Finding the Fourth Proportional to 71,311.52, 98,399.76 and 39,479.60

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Solution

The fourth proportional to 71,311.52, 98,399.76 and 39,479.60 is: 54,476.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,311.52 : 98,399.76 = 39,479.60 : x
  2. Step 2: Convert to fraction form
    71,311.52/98,399.76 = 39,479.60/x
  3. Step 3: Cross multiply
    71,311.52x = 98,399.76 × 39,479.60
  4. Step 4: Simplify right side
    71,311.52x = 3,884,783,164.90
  5. Step 5: Solve for x
    x = 3,884,783,164.90/71,311.52
  6. Step 6: Final answer
    x = 54,476.24

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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.