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Finding the Fourth Proportional to 122,805.70, 169,470.02 and 69,090.78

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Solution

The fourth proportional to 122,805.70, 169,470.02 and 69,090.78 is: 95,344.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,805.70 : 169,470.02 = 69,090.78 : x
  2. Step 2: Convert to fraction form
    122,805.70/169,470.02 = 69,090.78/x
  3. Step 3: Cross multiply
    122,805.70x = 169,470.02 × 69,090.78
  4. Step 4: Simplify right side
    122,805.70x = 11,708,815,868.42
  5. Step 5: Solve for x
    x = 11,708,815,868.42/122,805.70
  6. Step 6: Final answer
    x = 95,344.24

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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.