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Finding the Fourth Proportional to 123,776.75, 170,811.51 and 67,187.72

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Solution

The fourth proportional to 123,776.75, 170,811.51 and 67,187.72 is: 92,718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,776.75 : 170,811.51 = 67,187.72 : x
  2. Step 2: Convert to fraction form
    123,776.75/170,811.51 = 67,187.72/x
  3. Step 3: Cross multiply
    123,776.75x = 170,811.51 × 67,187.72
  4. Step 4: Simplify right side
    123,776.75x = 11,476,435,906.66
  5. Step 5: Solve for x
    x = 11,476,435,906.66/123,776.75
  6. Step 6: Final answer
    x = 92,718.83

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1.5x scale

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.