Home / 129,342.30-178,493.85-72,753.18

Finding the Fourth Proportional to 129,342.30, 178,493.85 and 72,753.18

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Solution

The fourth proportional to 129,342.30, 178,493.85 and 72,753.18 is: 100,400.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,342.30 : 178,493.85 = 72,753.18 : x
  2. Step 2: Convert to fraction form
    129,342.30/178,493.85 = 72,753.18/x
  3. Step 3: Cross multiply
    129,342.30x = 178,493.85 × 72,753.18
  4. Step 4: Simplify right side
    129,342.30x = 12,985,995,197.94
  5. Step 5: Solve for x
    x = 12,985,995,197.94/129,342.30
  6. Step 6: Final answer
    x = 100,400.22

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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.