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Finding the Fourth Proportional to 123,605.52, 170,559.92 and 80,565.36

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Solution

The fourth proportional to 123,605.52, 170,559.92 and 80,565.36 is: 111,169.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,605.52 : 170,559.92 = 80,565.36 : x
  2. Step 2: Convert to fraction form
    123,605.52/170,559.92 = 80,565.36/x
  3. Step 3: Cross multiply
    123,605.52x = 170,559.92 × 80,565.36
  4. Step 4: Simplify right side
    123,605.52x = 13,741,221,356.37
  5. Step 5: Solve for x
    x = 13,741,221,356.37/123,605.52
  6. Step 6: Final answer
    x = 111,169.97

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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.