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Finding the Fourth Proportional to 124,321.65, 186,481.11 and 74,415.69

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Solution

The fourth proportional to 124,321.65, 186,481.11 and 74,415.69 is: 111,622.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,321.65 : 186,481.11 = 74,415.69 : x
  2. Step 2: Convert to fraction form
    124,321.65/186,481.11 = 74,415.69/x
  3. Step 3: Cross multiply
    124,321.65x = 186,481.11 × 74,415.69
  4. Step 4: Simplify right side
    124,321.65x = 13,877,120,472.62
  5. Step 5: Solve for x
    x = 13,877,120,472.62/124,321.65
  6. Step 6: Final answer
    x = 111,622.72

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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.