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Finding the Fourth Proportional to 123,689.85, 170,691.93 and 67,101.22

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Solution

The fourth proportional to 123,689.85, 170,691.93 and 67,101.22 is: 92,599.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,689.85 : 170,691.93 = 67,101.22 : x
  2. Step 2: Convert to fraction form
    123,689.85/170,691.93 = 67,101.22/x
  3. Step 3: Cross multiply
    123,689.85x = 170,691.93 × 67,101.22
  4. Step 4: Simplify right side
    123,689.85x = 11,453,636,747.15
  5. Step 5: Solve for x
    x = 11,453,636,747.15/123,689.85
  6. Step 6: Final answer
    x = 92,599.65

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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.