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Finding the Fourth Proportional to 71,165.62, 98,206.85 and 38,898.80

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Solution

The fourth proportional to 71,165.62, 98,206.85 and 38,898.80 is: 53,679.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,165.62 : 98,206.85 = 38,898.80 : x
  2. Step 2: Convert to fraction form
    71,165.62/98,206.85 = 38,898.80/x
  3. Step 3: Cross multiply
    71,165.62x = 98,206.85 × 38,898.80
  4. Step 4: Simplify right side
    71,165.62x = 3,820,128,591.27
  5. Step 5: Solve for x
    x = 3,820,128,591.27/71,165.62
  6. Step 6: Final answer
    x = 53,679.41

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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.