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Finding the Fourth Proportional to 75.27, 113.32 and 51.38

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Solution

The fourth proportional to 75.27, 113.32 and 51.38 is: 77.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.27 : 113.32 = 51.38 : x
  2. Step 2: Convert to fraction form
    75.27/113.32 = 51.38/x
  3. Step 3: Cross multiply
    75.27x = 113.32 × 51.38
  4. Step 4: Simplify right side
    75.27x = 5,821.69
  5. Step 5: Solve for x
    x = 5,821.69/75.27
  6. Step 6: Final answer
    x = 77.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.