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Finding the Fourth Proportional to 122,649.90, 169,252.43 and 68,937.86

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Solution

The fourth proportional to 122,649.90, 169,252.43 and 68,937.86 is: 95,131.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,649.90 : 169,252.43 = 68,937.86 : x
  2. Step 2: Convert to fraction form
    122,649.90/169,252.43 = 68,937.86/x
  3. Step 3: Cross multiply
    122,649.90x = 169,252.43 × 68,937.86
  4. Step 4: Simplify right side
    122,649.90x = 11,667,899,133.05
  5. Step 5: Solve for x
    x = 11,667,899,133.05/122,649.90
  6. Step 6: Final answer
    x = 95,131.75

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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.