Home / 129,519.39-178,739.76-72,162.52

Finding the Fourth Proportional to 129,519.39, 178,739.76 and 72,162.52

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Solution

The fourth proportional to 129,519.39, 178,739.76 and 72,162.52 is: 99,585.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,519.39 : 178,739.76 = 72,162.52 : x
  2. Step 2: Convert to fraction form
    129,519.39/178,739.76 = 72,162.52/x
  3. Step 3: Cross multiply
    129,519.39x = 178,739.76 × 72,162.52
  4. Step 4: Simplify right side
    129,519.39x = 12,898,311,505.80
  5. Step 5: Solve for x
    x = 12,898,311,505.80/129,519.39
  6. Step 6: Final answer
    x = 99,585.95

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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.