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Finding the Fourth Proportional to 62.19, 86.29 and 61.56

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Solution

The fourth proportional to 62.19, 86.29 and 61.56 is: 85.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.19 : 86.29 = 61.56 : x
  2. Step 2: Convert to fraction form
    62.19/86.29 = 61.56/x
  3. Step 3: Cross multiply
    62.19x = 86.29 × 61.56
  4. Step 4: Simplify right side
    62.19x = 5,311.86
  5. Step 5: Solve for x
    x = 5,311.86/62.19
  6. Step 6: Final answer
    x = 85.41

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.