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Finding the Fourth Proportional to 95.12, 142.36 and 70.67

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Solution

The fourth proportional to 95.12, 142.36 and 70.67 is: 105.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.12 : 142.36 = 70.67 : x
  2. Step 2: Convert to fraction form
    95.12/142.36 = 70.67/x
  3. Step 3: Cross multiply
    95.12x = 142.36 × 70.67
  4. Step 4: Simplify right side
    95.12x = 10,060.76
  5. Step 5: Solve for x
    x = 10,060.76/95.12
  6. Step 6: Final answer
    x = 105.76

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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.