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Finding the Fourth Proportional to 95.32, 142.90 and 47.20

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Solution

The fourth proportional to 95.32, 142.90 and 47.20 is: 70.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.32 : 142.90 = 47.20 : x
  2. Step 2: Convert to fraction form
    95.32/142.90 = 47.20/x
  3. Step 3: Cross multiply
    95.32x = 142.90 × 47.20
  4. Step 4: Simplify right side
    95.32x = 6,744.88
  5. Step 5: Solve for x
    x = 6,744.88/95.32
  6. Step 6: Final answer
    x = 70.76

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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.