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Finding the Fourth Proportional to 123,776.10, 170,811.18 and 67,187.52

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Solution

The fourth proportional to 123,776.10, 170,811.18 and 67,187.52 is: 92,718.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,776.10 : 170,811.18 = 67,187.52 : x
  2. Step 2: Convert to fraction form
    123,776.10/170,811.18 = 67,187.52/x
  3. Step 3: Cross multiply
    123,776.10x = 170,811.18 × 67,187.52
  4. Step 4: Simplify right side
    123,776.10x = 11,476,379,572.47
  5. Step 5: Solve for x
    x = 11,476,379,572.47/123,776.10
  6. Step 6: Final answer
    x = 92,718.87

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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.