Home / 129,240.28-178,349.76-72,651.76

Finding the Fourth Proportional to 129,240.28, 178,349.76 and 72,651.76

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Solution

The fourth proportional to 129,240.28, 178,349.76 and 72,651.76 is: 100,258.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,240.28 : 178,349.76 = 72,651.76 : x
  2. Step 2: Convert to fraction form
    129,240.28/178,349.76 = 72,651.76/x
  3. Step 3: Cross multiply
    129,240.28x = 178,349.76 × 72,651.76
  4. Step 4: Simplify right side
    129,240.28x = 12,957,423,959.58
  5. Step 5: Solve for x
    x = 12,957,423,959.58/129,240.28
  6. Step 6: Final answer
    x = 100,258.40

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1.5x scale

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.