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Finding the Fourth Proportional to 114.90, 171.53 and 102.75

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Solution

The fourth proportional to 114.90, 171.53 and 102.75 is: 153.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.90 : 171.53 = 102.75 : x
  2. Step 2: Convert to fraction form
    114.90/171.53 = 102.75/x
  3. Step 3: Cross multiply
    114.90x = 171.53 × 102.75
  4. Step 4: Simplify right side
    114.90x = 17,624.19
  5. Step 5: Solve for x
    x = 17,624.19/114.90
  6. Step 6: Final answer
    x = 153.39

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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.