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Finding the Fourth Proportional to 64.12, 95.37 and 63.90

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Solution

The fourth proportional to 64.12, 95.37 and 63.90 is: 95.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.12 : 95.37 = 63.90 : x
  2. Step 2: Convert to fraction form
    64.12/95.37 = 63.90/x
  3. Step 3: Cross multiply
    64.12x = 95.37 × 63.90
  4. Step 4: Simplify right side
    64.12x = 6,094.14
  5. Step 5: Solve for x
    x = 6,094.14/64.12
  6. Step 6: Final answer
    x = 95.04

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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.