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Finding the Fourth Proportional to 123,876.76, 170,949.16 and 67,287.64

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Solution

The fourth proportional to 123,876.76, 170,949.16 and 67,287.64 is: 92,856.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,876.76 : 170,949.16 = 67,287.64 : x
  2. Step 2: Convert to fraction form
    123,876.76/170,949.16 = 67,287.64/x
  3. Step 3: Cross multiply
    123,876.76x = 170,949.16 × 67,287.64
  4. Step 4: Simplify right side
    123,876.76x = 11,502,765,536.38
  5. Step 5: Solve for x
    x = 11,502,765,536.38/123,876.76
  6. Step 6: Final answer
    x = 92,856.53

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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.