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Finding the Fourth Proportional to 159,830.28, 220,593.78 and 91,868.04

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Solution

The fourth proportional to 159,830.28, 220,593.78 and 91,868.04 is: 126,793.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,830.28 : 220,593.78 = 91,868.04 : x
  2. Step 2: Convert to fraction form
    159,830.28/220,593.78 = 91,868.04/x
  3. Step 3: Cross multiply
    159,830.28x = 220,593.78 × 91,868.04
  4. Step 4: Simplify right side
    159,830.28x = 20,265,518,204.79
  5. Step 5: Solve for x
    x = 20,265,518,204.79/159,830.28
  6. Step 6: Final answer
    x = 126,793.99

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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.