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Finding the Fourth Proportional to 123,118.26, 169,905.18 and 69,405.90

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Solution

The fourth proportional to 123,118.26, 169,905.18 and 69,405.90 is: 95,781.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,118.26 : 169,905.18 = 69,405.90 : x
  2. Step 2: Convert to fraction form
    123,118.26/169,905.18 = 69,405.90/x
  3. Step 3: Cross multiply
    123,118.26x = 169,905.18 × 69,405.90
  4. Step 4: Simplify right side
    123,118.26x = 11,792,421,932.56
  5. Step 5: Solve for x
    x = 11,792,421,932.56/123,118.26
  6. Step 6: Final answer
    x = 95,781.26

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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.