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Finding the Fourth Proportional to 148,674.63, 205,169.25 and 80,691.72

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Solution

The fourth proportional to 148,674.63, 205,169.25 and 80,691.72 is: 111,353.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,674.63 : 205,169.25 = 80,691.72 : x
  2. Step 2: Convert to fraction form
    148,674.63/205,169.25 = 80,691.72/x
  3. Step 3: Cross multiply
    148,674.63x = 205,169.25 × 80,691.72
  4. Step 4: Simplify right side
    148,674.63x = 16,555,459,673.61
  5. Step 5: Solve for x
    x = 16,555,459,673.61/148,674.63
  6. Step 6: Final answer
    x = 111,353.63

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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.