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Finding the Fourth Proportional to 121,472.80, 182,209.20 and 38,366.80

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Solution

The fourth proportional to 121,472.80, 182,209.20 and 38,366.80 is: 57,550.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,472.80 : 182,209.20 = 38,366.80 : x
  2. Step 2: Convert to fraction form
    121,472.80/182,209.20 = 38,366.80/x
  3. Step 3: Cross multiply
    121,472.80x = 182,209.20 × 38,366.80
  4. Step 4: Simplify right side
    121,472.80x = 6,990,783,934.56
  5. Step 5: Solve for x
    x = 6,990,783,934.56/121,472.80
  6. Step 6: Final answer
    x = 57,550.20

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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.