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Finding the Fourth Proportional to 102.03, 153.14 and 71.79

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Solution

The fourth proportional to 102.03, 153.14 and 71.79 is: 107.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.03 : 153.14 = 71.79 : x
  2. Step 2: Convert to fraction form
    102.03/153.14 = 71.79/x
  3. Step 3: Cross multiply
    102.03x = 153.14 × 71.79
  4. Step 4: Simplify right side
    102.03x = 10,993.92
  5. Step 5: Solve for x
    x = 10,993.92/102.03
  6. Step 6: Final answer
    x = 107.75

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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.