Home / 80,539.38-120,781.71-30,607.47

Finding the Fourth Proportional to 80,539.38, 120,781.71 and 30,607.47

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Solution

The fourth proportional to 80,539.38, 120,781.71 and 30,607.47 is: 45,900.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,539.38 : 120,781.71 = 30,607.47 : x
  2. Step 2: Convert to fraction form
    80,539.38/120,781.71 = 30,607.47/x
  3. Step 3: Cross multiply
    80,539.38x = 120,781.71 × 30,607.47
  4. Step 4: Simplify right side
    80,539.38x = 3,696,822,565.37
  5. Step 5: Solve for x
    x = 3,696,822,565.37/80,539.38
  6. Step 6: Final answer
    x = 45,900.81

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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.