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Finding the Fourth Proportional to 122,502.80, 169,042.10 and 68,775.50

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Solution

The fourth proportional to 122,502.80, 169,042.10 and 68,775.50 is: 94,903.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,502.80 : 169,042.10 = 68,775.50 : x
  2. Step 2: Convert to fraction form
    122,502.80/169,042.10 = 68,775.50/x
  3. Step 3: Cross multiply
    122,502.80x = 169,042.10 × 68,775.50
  4. Step 4: Simplify right side
    122,502.80x = 11,625,954,948.55
  5. Step 5: Solve for x
    x = 11,625,954,948.55/122,502.80
  6. Step 6: Final answer
    x = 94,903.59

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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.