Home / 148,757.76-205,289.28-81,691.20

Finding the Fourth Proportional to 148,757.76, 205,289.28 and 81,691.20

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Solution

The fourth proportional to 148,757.76, 205,289.28 and 81,691.20 is: 112,735.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,757.76 : 205,289.28 = 81,691.20 : x
  2. Step 2: Convert to fraction form
    148,757.76/205,289.28 = 81,691.20/x
  3. Step 3: Cross multiply
    148,757.76x = 205,289.28 × 81,691.20
  4. Step 4: Simplify right side
    148,757.76x = 16,770,327,630.34
  5. Step 5: Solve for x
    x = 16,770,327,630.34/148,757.76
  6. Step 6: Final answer
    x = 112,735.82

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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.