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Finding the Fourth Proportional to 114.90, 171.50 and 112.74

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Solution

The fourth proportional to 114.90, 171.50 and 112.74 is: 168.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.90 : 171.50 = 112.74 : x
  2. Step 2: Convert to fraction form
    114.90/171.50 = 112.74/x
  3. Step 3: Cross multiply
    114.90x = 171.50 × 112.74
  4. Step 4: Simplify right side
    114.90x = 19,334.91
  5. Step 5: Solve for x
    x = 19,334.91/114.90
  6. Step 6: Final answer
    x = 168.28

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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.