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Finding the Fourth Proportional to 63.42, 88.12 and 62.79

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Solution

The fourth proportional to 63.42, 88.12 and 62.79 is: 87.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.42 : 88.12 = 62.79 : x
  2. Step 2: Convert to fraction form
    63.42/88.12 = 62.79/x
  3. Step 3: Cross multiply
    63.42x = 88.12 × 62.79
  4. Step 4: Simplify right side
    63.42x = 5,533.05
  5. Step 5: Solve for x
    x = 5,533.05/63.42
  6. Step 6: Final answer
    x = 87.24

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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.