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Finding the Fourth Proportional to 64.08, 95.40 and 63.72

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Solution

The fourth proportional to 64.08, 95.40 and 63.72 is: 94.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.08 : 95.40 = 63.72 : x
  2. Step 2: Convert to fraction form
    64.08/95.40 = 63.72/x
  3. Step 3: Cross multiply
    64.08x = 95.40 × 63.72
  4. Step 4: Simplify right side
    64.08x = 6,078.89
  5. Step 5: Solve for x
    x = 6,078.89/64.08
  6. Step 6: Final answer
    x = 94.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.