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Finding the Fourth Proportional to 122,879.20, 169,578.84 and 69,182.68

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Solution

The fourth proportional to 122,879.20, 169,578.84 and 69,182.68 is: 95,475.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,879.20 : 169,578.84 = 69,182.68 : x
  2. Step 2: Convert to fraction form
    122,879.20/169,578.84 = 69,182.68/x
  3. Step 3: Cross multiply
    122,879.20x = 169,578.84 × 69,182.68
  4. Step 4: Simplify right side
    122,879.20x = 11,731,918,622.49
  5. Step 5: Solve for x
    x = 11,731,918,622.49/122,879.20
  6. Step 6: Final answer
    x = 95,475.22

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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.