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Finding the Fourth Proportional to 122,561.88, 169,128.90 and 68,849.16

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Solution

The fourth proportional to 122,561.88, 169,128.90 and 68,849.16 is: 95,008.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,561.88 : 169,128.90 = 68,849.16 : x
  2. Step 2: Convert to fraction form
    122,561.88/169,128.90 = 68,849.16/x
  3. Step 3: Cross multiply
    122,561.88x = 169,128.90 × 68,849.16
  4. Step 4: Simplify right side
    122,561.88x = 11,644,382,696.72
  5. Step 5: Solve for x
    x = 11,644,382,696.72/122,561.88
  6. Step 6: Final answer
    x = 95,008.19

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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.