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Finding the Fourth Proportional to 114.34, 171.21 and 83.74

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Solution

The fourth proportional to 114.34, 171.21 and 83.74 is: 125.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.34 : 171.21 = 83.74 : x
  2. Step 2: Convert to fraction form
    114.34/171.21 = 83.74/x
  3. Step 3: Cross multiply
    114.34x = 171.21 × 83.74
  4. Step 4: Simplify right side
    114.34x = 14,337.13
  5. Step 5: Solve for x
    x = 14,337.13/114.34
  6. Step 6: Final answer
    x = 125.39

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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.