Home / 80,631.76-120,895.80-38,489.08

Finding the Fourth Proportional to 80,631.76, 120,895.80 and 38,489.08

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Solution

The fourth proportional to 80,631.76, 120,895.80 and 38,489.08 is: 57,708.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,631.76 : 120,895.80 = 38,489.08 : x
  2. Step 2: Convert to fraction form
    80,631.76/120,895.80 = 38,489.08/x
  3. Step 3: Cross multiply
    80,631.76x = 120,895.80 × 38,489.08
  4. Step 4: Simplify right side
    80,631.76x = 4,653,168,117.86
  5. Step 5: Solve for x
    x = 4,653,168,117.86/80,631.76
  6. Step 6: Final answer
    x = 57,708.87

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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.