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Finding the Fourth Proportional to 64.60, 96.90 and 63.71

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Solution

The fourth proportional to 64.60, 96.90 and 63.71 is: 95.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.60 : 96.90 = 63.71 : x
  2. Step 2: Convert to fraction form
    64.60/96.90 = 63.71/x
  3. Step 3: Cross multiply
    64.60x = 96.90 × 63.71
  4. Step 4: Simplify right side
    64.60x = 6,173.01
  5. Step 5: Solve for x
    x = 6,173.01/64.60
  6. Step 6: Final answer
    x = 95.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.