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Finding the Fourth Proportional to 128,287.76, 192,431.20 and 34,793.52

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Solution

The fourth proportional to 128,287.76, 192,431.20 and 34,793.52 is: 52,190.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,287.76 : 192,431.20 = 34,793.52 : x
  2. Step 2: Convert to fraction form
    128,287.76/192,431.20 = 34,793.52/x
  3. Step 3: Cross multiply
    128,287.76x = 192,431.20 × 34,793.52
  4. Step 4: Simplify right side
    128,287.76x = 6,695,358,805.82
  5. Step 5: Solve for x
    x = 6,695,358,805.82/128,287.76
  6. Step 6: Final answer
    x = 52,190.16

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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.