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Finding the Fourth Proportional to 80,484.67, 120,845.49 and 45,015.48

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Solution

The fourth proportional to 80,484.67, 120,845.49 and 45,015.48 is: 67,589.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,484.67 : 120,845.49 = 45,015.48 : x
  2. Step 2: Convert to fraction form
    80,484.67/120,845.49 = 45,015.48/x
  3. Step 3: Cross multiply
    80,484.67x = 120,845.49 × 45,015.48
  4. Step 4: Simplify right side
    80,484.67x = 5,439,917,569.38
  5. Step 5: Solve for x
    x = 5,439,917,569.38/80,484.67
  6. Step 6: Final answer
    x = 67,589.49

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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.