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Finding the Fourth Proportional to 138,451.92, 206,919.15 and 101,090.67

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Solution

The fourth proportional to 138,451.92, 206,919.15 and 101,090.67 is: 151,082.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,451.92 : 206,919.15 = 101,090.67 : x
  2. Step 2: Convert to fraction form
    138,451.92/206,919.15 = 101,090.67/x
  3. Step 3: Cross multiply
    138,451.92x = 206,919.15 × 101,090.67
  4. Step 4: Simplify right side
    138,451.92x = 20,917,595,509.33
  5. Step 5: Solve for x
    x = 20,917,595,509.33/138,451.92
  6. Step 6: Final answer
    x = 151,082.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.