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Finding the Fourth Proportional to 85.18, 127.70 and 41.82

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Solution

The fourth proportional to 85.18, 127.70 and 41.82 is: 62.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85.18 : 127.70 = 41.82 : x
  2. Step 2: Convert to fraction form
    85.18/127.70 = 41.82/x
  3. Step 3: Cross multiply
    85.18x = 127.70 × 41.82
  4. Step 4: Simplify right side
    85.18x = 5,340.41
  5. Step 5: Solve for x
    x = 5,340.41/85.18
  6. Step 6: Final answer
    x = 62.70

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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.