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Finding the Fourth Proportional to 100,391.70, 138,552.06 and 60,105.42

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Solution

The fourth proportional to 100,391.70, 138,552.06 and 60,105.42 is: 82,952.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,391.70 : 138,552.06 = 60,105.42 : x
  2. Step 2: Convert to fraction form
    100,391.70/138,552.06 = 60,105.42/x
  3. Step 3: Cross multiply
    100,391.70x = 138,552.06 × 60,105.42
  4. Step 4: Simplify right side
    100,391.70x = 8,327,729,758.17
  5. Step 5: Solve for x
    x = 8,327,729,758.17/100,391.70
  6. Step 6: Final answer
    x = 82,952.37

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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.