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Finding the Fourth Proportional to 123,879.30, 170,944.98 and 67,289.46

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Solution

The fourth proportional to 123,879.30, 170,944.98 and 67,289.46 is: 92,854.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,879.30 : 170,944.98 = 67,289.46 : x
  2. Step 2: Convert to fraction form
    123,879.30/170,944.98 = 67,289.46/x
  3. Step 3: Cross multiply
    123,879.30x = 170,944.98 × 67,289.46
  4. Step 4: Simplify right side
    123,879.30x = 11,502,795,393.91
  5. Step 5: Solve for x
    x = 11,502,795,393.91/123,879.30
  6. Step 6: Final answer
    x = 92,854.86

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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.