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Finding the Fourth Proportional to 101,249.08, 139,789.42 and 90,620.28

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Solution

The fourth proportional to 101,249.08, 139,789.42 and 90,620.28 is: 125,114.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,249.08 : 139,789.42 = 90,620.28 : x
  2. Step 2: Convert to fraction form
    101,249.08/139,789.42 = 90,620.28/x
  3. Step 3: Cross multiply
    101,249.08x = 139,789.42 × 90,620.28
  4. Step 4: Simplify right side
    101,249.08x = 12,667,756,381.44
  5. Step 5: Solve for x
    x = 12,667,756,381.44/101,249.08
  6. Step 6: Final answer
    x = 125,114.78

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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.