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Finding the Fourth Proportional to 123,203.76, 170,020.95 and 69,488.61

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Solution

The fourth proportional to 123,203.76, 170,020.95 and 69,488.61 is: 95,894.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,203.76 : 170,020.95 = 69,488.61 : x
  2. Step 2: Convert to fraction form
    123,203.76/170,020.95 = 69,488.61/x
  3. Step 3: Cross multiply
    123,203.76x = 170,020.95 × 69,488.61
  4. Step 4: Simplify right side
    123,203.76x = 11,814,519,486.38
  5. Step 5: Solve for x
    x = 11,814,519,486.38/123,203.76
  6. Step 6: Final answer
    x = 95,894.15

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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.