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Finding the Fourth Proportional to 123,726.65, 170,743.25 and 67,138.03

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Solution

The fourth proportional to 123,726.65, 170,743.25 and 67,138.03 is: 92,650.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,726.65 : 170,743.25 = 67,138.03 : x
  2. Step 2: Convert to fraction form
    123,726.65/170,743.25 = 67,138.03/x
  3. Step 3: Cross multiply
    123,726.65x = 170,743.25 × 67,138.03
  4. Step 4: Simplify right side
    123,726.65x = 11,463,364,930.02
  5. Step 5: Solve for x
    x = 11,463,364,930.02/123,726.65
  6. Step 6: Final answer
    x = 92,650.73

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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.