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Finding the Fourth Proportional to 100,073.74, 138,102.78 and 54,750.73

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Solution

The fourth proportional to 100,073.74, 138,102.78 and 54,750.73 is: 75,556.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,073.74 : 138,102.78 = 54,750.73 : x
  2. Step 2: Convert to fraction form
    100,073.74/138,102.78 = 54,750.73/x
  3. Step 3: Cross multiply
    100,073.74x = 138,102.78 × 54,750.73
  4. Step 4: Simplify right side
    100,073.74x = 7,561,228,020.03
  5. Step 5: Solve for x
    x = 7,561,228,020.03/100,073.74
  6. Step 6: Final answer
    x = 75,556.56

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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.