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Finding the Fourth Proportional to 114.64, 171.04 and 109.57

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Solution

The fourth proportional to 114.64, 171.04 and 109.57 is: 163.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.64 : 171.04 = 109.57 : x
  2. Step 2: Convert to fraction form
    114.64/171.04 = 109.57/x
  3. Step 3: Cross multiply
    114.64x = 171.04 × 109.57
  4. Step 4: Simplify right side
    114.64x = 18,740.37
  5. Step 5: Solve for x
    x = 18,740.37/114.64
  6. Step 6: Final answer
    x = 163.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.