Home / 129,327.35-178,470.02-72,738.72

Finding the Fourth Proportional to 129,327.35, 178,470.02 and 72,738.72

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Solution

The fourth proportional to 129,327.35, 178,470.02 and 72,738.72 is: 100,378.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,327.35 : 178,470.02 = 72,738.72 : x
  2. Step 2: Convert to fraction form
    129,327.35/178,470.02 = 72,738.72/x
  3. Step 3: Cross multiply
    129,327.35x = 178,470.02 × 72,738.72
  4. Step 4: Simplify right side
    129,327.35x = 12,981,680,449.48
  5. Step 5: Solve for x
    x = 12,981,680,449.48/129,327.35
  6. Step 6: Final answer
    x = 100,378.47

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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.