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Finding the Fourth Proportional to 115.03, 173.18 and 79.20

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Solution

The fourth proportional to 115.03, 173.18 and 79.20 is: 119.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.03 : 173.18 = 79.20 : x
  2. Step 2: Convert to fraction form
    115.03/173.18 = 79.20/x
  3. Step 3: Cross multiply
    115.03x = 173.18 × 79.20
  4. Step 4: Simplify right side
    115.03x = 13,715.86
  5. Step 5: Solve for x
    x = 13,715.86/115.03
  6. Step 6: Final answer
    x = 119.24

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.