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Finding the Fourth Proportional to 123,726.97, 170,743.67 and 67,138.34

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Solution

The fourth proportional to 123,726.97, 170,743.67 and 67,138.34 is: 92,651.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,726.97 : 170,743.67 = 67,138.34 : x
  2. Step 2: Convert to fraction form
    123,726.97/170,743.67 = 67,138.34/x
  3. Step 3: Cross multiply
    123,726.97x = 170,743.67 × 67,138.34
  4. Step 4: Simplify right side
    123,726.97x = 11,463,446,569.31
  5. Step 5: Solve for x
    x = 11,463,446,569.31/123,726.97
  6. Step 6: Final answer
    x = 92,651.15

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1.5x scale

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.