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Finding the Fourth Proportional to 99,231.72, 148,692 and 84,379.56

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Solution

The fourth proportional to 99,231.72, 148,692 and 84,379.56 is: 126,437.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,231.72 : 148,692 = 84,379.56 : x
  2. Step 2: Convert to fraction form
    99,231.72/148,692 = 84,379.56/x
  3. Step 3: Cross multiply
    99,231.72x = 148,692 × 84,379.56
  4. Step 4: Simplify right side
    99,231.72x = 12,546,565,535.52
  5. Step 5: Solve for x
    x = 12,546,565,535.52/99,231.72
  6. Step 6: Final answer
    x = 126,437.05

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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.