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Finding the Fourth Proportional to 66,939.68, 100,379.52 and 48,141

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Solution

The fourth proportional to 66,939.68, 100,379.52 and 48,141 is: 72,189.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,939.68 : 100,379.52 = 48,141 : x
  2. Step 2: Convert to fraction form
    66,939.68/100,379.52 = 48,141/x
  3. Step 3: Cross multiply
    66,939.68x = 100,379.52 × 48,141
  4. Step 4: Simplify right side
    66,939.68x = 4,832,370,472.32
  5. Step 5: Solve for x
    x = 4,832,370,472.32/66,939.68
  6. Step 6: Final answer
    x = 72,189.92

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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.