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Finding the Fourth Proportional to 100,070.74, 138,098.64 and 54,747.73

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Solution

The fourth proportional to 100,070.74, 138,098.64 and 54,747.73 is: 75,552.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,070.74 : 138,098.64 = 54,747.73 : x
  2. Step 2: Convert to fraction form
    100,070.74/138,098.64 = 54,747.73/x
  3. Step 3: Cross multiply
    100,070.74x = 138,098.64 × 54,747.73
  4. Step 4: Simplify right side
    100,070.74x = 7,560,586,091.86
  5. Step 5: Solve for x
    x = 7,560,586,091.86/100,070.74
  6. Step 6: Final answer
    x = 75,552.42

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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.