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Finding the Fourth Proportional to 62.48, 86.20 and 59.18

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Solution

The fourth proportional to 62.48, 86.20 and 59.18 is: 81.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.48 : 86.20 = 59.18 : x
  2. Step 2: Convert to fraction form
    62.48/86.20 = 59.18/x
  3. Step 3: Cross multiply
    62.48x = 86.20 × 59.18
  4. Step 4: Simplify right side
    62.48x = 5,100.74
  5. Step 5: Solve for x
    x = 5,100.74/62.48
  6. Step 6: Final answer
    x = 81.63

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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.