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Finding the Fourth Proportional to 80,428.32, 110,989.80 and 44,617.68

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Solution

The fourth proportional to 80,428.32, 110,989.80 and 44,617.68 is: 61,571.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,428.32 : 110,989.80 = 44,617.68 : x
  2. Step 2: Convert to fraction form
    80,428.32/110,989.80 = 44,617.68/x
  3. Step 3: Cross multiply
    80,428.32x = 110,989.80 × 44,617.68
  4. Step 4: Simplify right side
    80,428.32x = 4,952,107,379.66
  5. Step 5: Solve for x
    x = 4,952,107,379.66/80,428.32
  6. Step 6: Final answer
    x = 61,571.69

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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.