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Finding the Fourth Proportional to 121,518.80, 182,278.20 and 68,374.70

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Solution

The fourth proportional to 121,518.80, 182,278.20 and 68,374.70 is: 102,562.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,518.80 : 182,278.20 = 68,374.70 : x
  2. Step 2: Convert to fraction form
    121,518.80/182,278.20 = 68,374.70/x
  3. Step 3: Cross multiply
    121,518.80x = 182,278.20 × 68,374.70
  4. Step 4: Simplify right side
    121,518.80x = 12,463,217,241.54
  5. Step 5: Solve for x
    x = 12,463,217,241.54/121,518.80
  6. Step 6: Final answer
    x = 102,562.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.