Home / 77,854.18-116,781.27-18,689.85

Finding the Fourth Proportional to 77,854.18, 116,781.27 and 18,689.85

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Solution

The fourth proportional to 77,854.18, 116,781.27 and 18,689.85 is: 28,034.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,854.18 : 116,781.27 = 18,689.85 : x
  2. Step 2: Convert to fraction form
    77,854.18/116,781.27 = 18,689.85/x
  3. Step 3: Cross multiply
    77,854.18x = 116,781.27 × 18,689.85
  4. Step 4: Simplify right side
    77,854.18x = 2,182,624,454.15
  5. Step 5: Solve for x
    x = 2,182,624,454.15/77,854.18
  6. Step 6: Final answer
    x = 28,034.78

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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.