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Finding the Fourth Proportional to 122,418.54, 168,949.80 and 74,703.87

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Solution

The fourth proportional to 122,418.54, 168,949.80 and 74,703.87 is: 103,098.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,418.54 : 168,949.80 = 74,703.87 : x
  2. Step 2: Convert to fraction form
    122,418.54/168,949.80 = 74,703.87/x
  3. Step 3: Cross multiply
    122,418.54x = 168,949.80 × 74,703.87
  4. Step 4: Simplify right side
    122,418.54x = 12,621,203,895.73
  5. Step 5: Solve for x
    x = 12,621,203,895.73/122,418.54
  6. Step 6: Final answer
    x = 103,098.79

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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.