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Finding the Fourth Proportional to 125,079.46, 172,609.71 and 67,718.78

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Solution

The fourth proportional to 125,079.46, 172,609.71 and 67,718.78 is: 93,451.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,079.46 : 172,609.71 = 67,718.78 : x
  2. Step 2: Convert to fraction form
    125,079.46/172,609.71 = 67,718.78/x
  3. Step 3: Cross multiply
    125,079.46x = 172,609.71 × 67,718.78
  4. Step 4: Simplify right side
    125,079.46x = 11,688,918,977.35
  5. Step 5: Solve for x
    x = 11,688,918,977.35/125,079.46
  6. Step 6: Final answer
    x = 93,451.95

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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.