Home / 112,691.12-155,619.09-72,474.71

Finding the Fourth Proportional to 112,691.12, 155,619.09 and 72,474.71

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Solution

The fourth proportional to 112,691.12, 155,619.09 and 72,474.71 is: 100,082.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,691.12 : 155,619.09 = 72,474.71 : x
  2. Step 2: Convert to fraction form
    112,691.12/155,619.09 = 72,474.71/x
  3. Step 3: Cross multiply
    112,691.12x = 155,619.09 × 72,474.71
  4. Step 4: Simplify right side
    112,691.12x = 11,278,447,640.12
  5. Step 5: Solve for x
    x = 11,278,447,640.12/112,691.12
  6. Step 6: Final answer
    x = 100,082.85

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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.