Home / 80,721.11-121,081.73-38,591.25

Finding the Fourth Proportional to 80,721.11, 121,081.73 and 38,591.25

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Solution

The fourth proportional to 80,721.11, 121,081.73 and 38,591.25 is: 57,886.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,721.11 : 121,081.73 = 38,591.25 : x
  2. Step 2: Convert to fraction form
    80,721.11/121,081.73 = 38,591.25/x
  3. Step 3: Cross multiply
    80,721.11x = 121,081.73 × 38,591.25
  4. Step 4: Simplify right side
    80,721.11x = 4,672,695,119.91
  5. Step 5: Solve for x
    x = 4,672,695,119.91/80,721.11
  6. Step 6: Final answer
    x = 57,886.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.