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Finding the Fourth Proportional to 95.45, 143.10 and 40.64

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Solution

The fourth proportional to 95.45, 143.10 and 40.64 is: 60.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.45 : 143.10 = 40.64 : x
  2. Step 2: Convert to fraction form
    95.45/143.10 = 40.64/x
  3. Step 3: Cross multiply
    95.45x = 143.10 × 40.64
  4. Step 4: Simplify right side
    95.45x = 5,814.87
  5. Step 5: Solve for x
    x = 5,814.87/95.45
  6. Step 6: Final answer
    x = 60.92

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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.