Home / 129,512.24-178,724.18-72,151.47

Finding the Fourth Proportional to 129,512.24, 178,724.18 and 72,151.47

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Solution

The fourth proportional to 129,512.24, 178,724.18 and 72,151.47 is: 99,567.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,512.24 : 178,724.18 = 72,151.47 : x
  2. Step 2: Convert to fraction form
    129,512.24/178,724.18 = 72,151.47/x
  3. Step 3: Cross multiply
    129,512.24x = 178,724.18 × 72,151.47
  4. Step 4: Simplify right side
    129,512.24x = 12,895,211,950.79
  5. Step 5: Solve for x
    x = 12,895,211,950.79/129,512.24
  6. Step 6: Final answer
    x = 99,567.52

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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.