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Finding the Fourth Proportional to 64.27, 88.72 and 50.42

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Solution

The fourth proportional to 64.27, 88.72 and 50.42 is: 69.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.27 : 88.72 = 50.42 : x
  2. Step 2: Convert to fraction form
    64.27/88.72 = 50.42/x
  3. Step 3: Cross multiply
    64.27x = 88.72 × 50.42
  4. Step 4: Simplify right side
    64.27x = 4,473.50
  5. Step 5: Solve for x
    x = 4,473.50/64.27
  6. Step 6: Final answer
    x = 69.61

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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.