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Finding the Fourth Proportional to 111,489.92, 168,002 and 92,202.20

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Solution

The fourth proportional to 111,489.92, 168,002 and 92,202.20 is: 138,937.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,489.92 : 168,002 = 92,202.20 : x
  2. Step 2: Convert to fraction form
    111,489.92/168,002 = 92,202.20/x
  3. Step 3: Cross multiply
    111,489.92x = 168,002 × 92,202.20
  4. Step 4: Simplify right side
    111,489.92x = 15,490,154,004.40
  5. Step 5: Solve for x
    x = 15,490,154,004.40/111,489.92
  6. Step 6: Final answer
    x = 138,937.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.