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Finding the Fourth Proportional to 169,605.79, 254,414.08 and 85,319.89

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Solution

The fourth proportional to 169,605.79, 254,414.08 and 85,319.89 is: 127,982.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,605.79 : 254,414.08 = 85,319.89 : x
  2. Step 2: Convert to fraction form
    169,605.79/254,414.08 = 85,319.89/x
  3. Step 3: Cross multiply
    169,605.79x = 254,414.08 × 85,319.89
  4. Step 4: Simplify right side
    169,605.79x = 21,706,581,320.05
  5. Step 5: Solve for x
    x = 21,706,581,320.05/169,605.79
  6. Step 6: Final answer
    x = 127,982.55

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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.