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Finding the Fourth Proportional to 122,658.64, 169,273.71 and 68,943.49

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Solution

The fourth proportional to 122,658.64, 169,273.71 and 68,943.49 is: 95,144.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,658.64 : 169,273.71 = 68,943.49 : x
  2. Step 2: Convert to fraction form
    122,658.64/169,273.71 = 68,943.49/x
  3. Step 3: Cross multiply
    122,658.64x = 169,273.71 × 68,943.49
  4. Step 4: Simplify right side
    122,658.64x = 11,670,320,332.65
  5. Step 5: Solve for x
    x = 11,670,320,332.65/122,658.64
  6. Step 6: Final answer
    x = 95,144.71

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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.