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Finding the Fourth Proportional to 123,379.92, 170,267.40 and 75,659.58

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Solution

The fourth proportional to 123,379.92, 170,267.40 and 75,659.58 is: 104,412.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,379.92 : 170,267.40 = 75,659.58 : x
  2. Step 2: Convert to fraction form
    123,379.92/170,267.40 = 75,659.58/x
  3. Step 3: Cross multiply
    123,379.92x = 170,267.40 × 75,659.58
  4. Step 4: Simplify right side
    123,379.92x = 12,882,359,971.69
  5. Step 5: Solve for x
    x = 12,882,359,971.69/123,379.92
  6. Step 6: Final answer
    x = 104,412.13

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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.