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Finding the Fourth Proportional to 123,058.32, 169,820.48 and 66,469.69

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Solution

The fourth proportional to 123,058.32, 169,820.48 and 66,469.69 is: 91,728.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,058.32 : 169,820.48 = 66,469.69 : x
  2. Step 2: Convert to fraction form
    123,058.32/169,820.48 = 66,469.69/x
  3. Step 3: Cross multiply
    123,058.32x = 169,820.48 × 66,469.69
  4. Step 4: Simplify right side
    123,058.32x = 11,287,915,039.70
  5. Step 5: Solve for x
    x = 11,287,915,039.70/123,058.32
  6. Step 6: Final answer
    x = 91,728.18

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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.