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Finding the Fourth Proportional to 123,353.65, 170,229.48 and 72,367.26

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Solution

The fourth proportional to 123,353.65, 170,229.48 and 72,367.26 is: 99,867.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,353.65 : 170,229.48 = 72,367.26 : x
  2. Step 2: Convert to fraction form
    123,353.65/170,229.48 = 72,367.26/x
  3. Step 3: Cross multiply
    123,353.65x = 170,229.48 × 72,367.26
  4. Step 4: Simplify right side
    123,353.65x = 12,319,040,129.09
  5. Step 5: Solve for x
    x = 12,319,040,129.09/123,353.65
  6. Step 6: Final answer
    x = 99,867.66

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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.