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Finding the Fourth Proportional to 128,363.52, 192,283.20 and 75,613.44

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Solution

The fourth proportional to 128,363.52, 192,283.20 and 75,613.44 is: 113,265.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,363.52 : 192,283.20 = 75,613.44 : x
  2. Step 2: Convert to fraction form
    128,363.52/192,283.20 = 75,613.44/x
  3. Step 3: Cross multiply
    128,363.52x = 192,283.20 × 75,613.44
  4. Step 4: Simplify right side
    128,363.52x = 14,539,194,206.21
  5. Step 5: Solve for x
    x = 14,539,194,206.21/128,363.52
  6. Step 6: Final answer
    x = 113,265.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.