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Finding the Fourth Proportional to 125,249.91, 172,856.85 and 71,542.95

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Solution

The fourth proportional to 125,249.91, 172,856.85 and 71,542.95 is: 98,736.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,249.91 : 172,856.85 = 71,542.95 : x
  2. Step 2: Convert to fraction form
    125,249.91/172,856.85 = 71,542.95/x
  3. Step 3: Cross multiply
    125,249.91x = 172,856.85 × 71,542.95
  4. Step 4: Simplify right side
    125,249.91x = 12,366,688,976.71
  5. Step 5: Solve for x
    x = 12,366,688,976.71/125,249.91
  6. Step 6: Final answer
    x = 98,736.11

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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.