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Finding the Fourth Proportional to 128,149.65, 192,227.52 and 39,403.97

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Solution

The fourth proportional to 128,149.65, 192,227.52 and 39,403.97 is: 59,106.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,149.65 : 192,227.52 = 39,403.97 : x
  2. Step 2: Convert to fraction form
    128,149.65/192,227.52 = 39,403.97/x
  3. Step 3: Cross multiply
    128,149.65x = 192,227.52 × 39,403.97
  4. Step 4: Simplify right side
    128,149.65x = 7,574,526,470.12
  5. Step 5: Solve for x
    x = 7,574,526,470.12/128,149.65
  6. Step 6: Final answer
    x = 59,106.88

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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.