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Finding the Fourth Proportional to 122,929.86, 169,630 and 69,213.90

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Solution

The fourth proportional to 122,929.86, 169,630 and 69,213.90 is: 95,507.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,929.86 : 169,630 = 69,213.90 : x
  2. Step 2: Convert to fraction form
    122,929.86/169,630 = 69,213.90/x
  3. Step 3: Cross multiply
    122,929.86x = 169,630 × 69,213.90
  4. Step 4: Simplify right side
    122,929.86x = 11,740,753,857.00
  5. Step 5: Solve for x
    x = 11,740,753,857.00/122,929.86
  6. Step 6: Final answer
    x = 95,507.75

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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.