Home / 129,088.50-178,151.22-72,499.92

Finding the Fourth Proportional to 129,088.50, 178,151.22 and 72,499.92

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Solution

The fourth proportional to 129,088.50, 178,151.22 and 72,499.92 is: 100,054.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,088.50 : 178,151.22 = 72,499.92 : x
  2. Step 2: Convert to fraction form
    129,088.50/178,151.22 = 72,499.92/x
  3. Step 3: Cross multiply
    129,088.50x = 178,151.22 × 72,499.92
  4. Step 4: Simplify right side
    129,088.50x = 12,915,949,197.90
  5. Step 5: Solve for x
    x = 12,915,949,197.90/129,088.50
  6. Step 6: Final answer
    x = 100,054.99

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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.