Home / 80,821.76-121,251.72-25,417.76

Finding the Fourth Proportional to 80,821.76, 121,251.72 and 25,417.76

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Solution

The fourth proportional to 80,821.76, 121,251.72 and 25,417.76 is: 38,132.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,821.76 : 121,251.72 = 25,417.76 : x
  2. Step 2: Convert to fraction form
    80,821.76/121,251.72 = 25,417.76/x
  3. Step 3: Cross multiply
    80,821.76x = 121,251.72 × 25,417.76
  4. Step 4: Simplify right side
    80,821.76x = 3,081,947,118.55
  5. Step 5: Solve for x
    x = 3,081,947,118.55/80,821.76
  6. Step 6: Final answer
    x = 38,132.64

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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.