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Finding the Fourth Proportional to 169,565.40, 254,348.10 and 80,991.90

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Solution

The fourth proportional to 169,565.40, 254,348.10 and 80,991.90 is: 121,487.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,565.40 : 254,348.10 = 80,991.90 : x
  2. Step 2: Convert to fraction form
    169,565.40/254,348.10 = 80,991.90/x
  3. Step 3: Cross multiply
    169,565.40x = 254,348.10 × 80,991.90
  4. Step 4: Simplify right side
    169,565.40x = 20,600,135,880.39
  5. Step 5: Solve for x
    x = 20,600,135,880.39/169,565.40
  6. Step 6: Final answer
    x = 121,487.85

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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.