Home / 83,977.20-115,912.35-55,317.78

Finding the Fourth Proportional to 83,977.20, 115,912.35 and 55,317.78

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Solution

The fourth proportional to 83,977.20, 115,912.35 and 55,317.78 is: 76,354.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,977.20 : 115,912.35 = 55,317.78 : x
  2. Step 2: Convert to fraction form
    83,977.20/115,912.35 = 55,317.78/x
  3. Step 3: Cross multiply
    83,977.20x = 115,912.35 × 55,317.78
  4. Step 4: Simplify right side
    83,977.20x = 6,412,013,876.58
  5. Step 5: Solve for x
    x = 6,412,013,876.58/83,977.20
  6. Step 6: Final answer
    x = 76,354.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.