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Finding the Fourth Proportional to 64.05, 96.76 and 63.81

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Solution

The fourth proportional to 64.05, 96.76 and 63.81 is: 96.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.05 : 96.76 = 63.81 : x
  2. Step 2: Convert to fraction form
    64.05/96.76 = 63.81/x
  3. Step 3: Cross multiply
    64.05x = 96.76 × 63.81
  4. Step 4: Simplify right side
    64.05x = 6,174.10
  5. Step 5: Solve for x
    x = 6,174.10/64.05
  6. Step 6: Final answer
    x = 96.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.