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Finding the Fourth Proportional to 114.24, 171.20 and 75.72

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Solution

The fourth proportional to 114.24, 171.20 and 75.72 is: 113.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.24 : 171.20 = 75.72 : x
  2. Step 2: Convert to fraction form
    114.24/171.20 = 75.72/x
  3. Step 3: Cross multiply
    114.24x = 171.20 × 75.72
  4. Step 4: Simplify right side
    114.24x = 12,963.26
  5. Step 5: Solve for x
    x = 12,963.26/114.24
  6. Step 6: Final answer
    x = 113.47

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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.