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Finding the Fourth Proportional to 127,919.48, 191,944.02 and 86,279

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Solution

The fourth proportional to 127,919.48, 191,944.02 and 86,279 is: 129,462.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,919.48 : 191,944.02 = 86,279 : x
  2. Step 2: Convert to fraction form
    127,919.48/191,944.02 = 86,279/x
  3. Step 3: Cross multiply
    127,919.48x = 191,944.02 × 86,279
  4. Step 4: Simplify right side
    127,919.48x = 16,560,738,101.58
  5. Step 5: Solve for x
    x = 16,560,738,101.58/127,919.48
  6. Step 6: Final answer
    x = 129,462.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.