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Finding the Fourth Proportional to 63.86, 88.50 and 60.89

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Solution

The fourth proportional to 63.86, 88.50 and 60.89 is: 84.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.86 : 88.50 = 60.89 : x
  2. Step 2: Convert to fraction form
    63.86/88.50 = 60.89/x
  3. Step 3: Cross multiply
    63.86x = 88.50 × 60.89
  4. Step 4: Simplify right side
    63.86x = 5,388.88
  5. Step 5: Solve for x
    x = 5,388.88/63.86
  6. Step 6: Final answer
    x = 84.39

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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.