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Finding the Fourth Proportional to 95.12, 142.70 and 51.82

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Solution

The fourth proportional to 95.12, 142.70 and 51.82 is: 77.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.12 : 142.70 = 51.82 : x
  2. Step 2: Convert to fraction form
    95.12/142.70 = 51.82/x
  3. Step 3: Cross multiply
    95.12x = 142.70 × 51.82
  4. Step 4: Simplify right side
    95.12x = 7,394.71
  5. Step 5: Solve for x
    x = 7,394.71/95.12
  6. Step 6: Final answer
    x = 77.74

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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.