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Finding the Fourth Proportional to 100,550.92, 138,760.58 and 54,610.72

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Solution

The fourth proportional to 100,550.92, 138,760.58 and 54,610.72 is: 75,362.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,550.92 : 138,760.58 = 54,610.72 : x
  2. Step 2: Convert to fraction form
    100,550.92/138,760.58 = 54,610.72/x
  3. Step 3: Cross multiply
    100,550.92x = 138,760.58 × 54,610.72
  4. Step 4: Simplify right side
    100,550.92x = 7,577,815,181.42
  5. Step 5: Solve for x
    x = 7,577,815,181.42/100,550.92
  6. Step 6: Final answer
    x = 75,362.96

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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.