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Finding the Fourth Proportional to 71,671.80, 98,761.38 and 55,440.54

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Solution

The fourth proportional to 71,671.80, 98,761.38 and 55,440.54 is: 76,395.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,671.80 : 98,761.38 = 55,440.54 : x
  2. Step 2: Convert to fraction form
    71,671.80/98,761.38 = 55,440.54/x
  3. Step 3: Cross multiply
    71,671.80x = 98,761.38 × 55,440.54
  4. Step 4: Simplify right side
    71,671.80x = 5,475,384,238.35
  5. Step 5: Solve for x
    x = 5,475,384,238.35/71,671.80
  6. Step 6: Final answer
    x = 76,395.24

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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.