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Finding the Fourth Proportional to 122,608.83, 169,203.15 and 68,890.64

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Solution

The fourth proportional to 122,608.83, 169,203.15 and 68,890.64 is: 95,070.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,608.83 : 169,203.15 = 68,890.64 : x
  2. Step 2: Convert to fraction form
    122,608.83/169,203.15 = 68,890.64/x
  3. Step 3: Cross multiply
    122,608.83x = 169,203.15 × 68,890.64
  4. Step 4: Simplify right side
    122,608.83x = 11,656,513,716.52
  5. Step 5: Solve for x
    x = 11,656,513,716.52/122,608.83
  6. Step 6: Final answer
    x = 95,070.75

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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.