Home / 81,348.42-121,468.88-71,780.97

Finding the Fourth Proportional to 81,348.42, 121,468.88 and 71,780.97

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Solution

The fourth proportional to 81,348.42, 121,468.88 and 71,780.97 is: 107,182.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,348.42 : 121,468.88 = 71,780.97 : x
  2. Step 2: Convert to fraction form
    81,348.42/121,468.88 = 71,780.97/x
  3. Step 3: Cross multiply
    81,348.42x = 121,468.88 × 71,780.97
  4. Step 4: Simplify right side
    81,348.42x = 8,719,154,210.67
  5. Step 5: Solve for x
    x = 8,719,154,210.67/81,348.42
  6. Step 6: Final answer
    x = 107,182.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.