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Finding the Fourth Proportional to 123,657.75, 170,647.71 and 69,941.61

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Solution

The fourth proportional to 123,657.75, 170,647.71 and 69,941.61 is: 96,519.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,657.75 : 170,647.71 = 69,941.61 : x
  2. Step 2: Convert to fraction form
    123,657.75/170,647.71 = 69,941.61/x
  3. Step 3: Cross multiply
    123,657.75x = 170,647.71 × 69,941.61
  4. Step 4: Simplify right side
    123,657.75x = 11,935,375,317.93
  5. Step 5: Solve for x
    x = 11,935,375,317.93/123,657.75
  6. Step 6: Final answer
    x = 96,519.43

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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.