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Finding the Fourth Proportional to 100,143.44, 138,196.68 and 60,399.44

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Solution

The fourth proportional to 100,143.44, 138,196.68 and 60,399.44 is: 83,350.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,143.44 : 138,196.68 = 60,399.44 : x
  2. Step 2: Convert to fraction form
    100,143.44/138,196.68 = 60,399.44/x
  3. Step 3: Cross multiply
    100,143.44x = 138,196.68 × 60,399.44
  4. Step 4: Simplify right side
    100,143.44x = 8,347,002,081.86
  5. Step 5: Solve for x
    x = 8,347,002,081.86/100,143.44
  6. Step 6: Final answer
    x = 83,350.46

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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.