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Finding the Fourth Proportional to 115.60, 173.18 and 111.74

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Solution

The fourth proportional to 115.60, 173.18 and 111.74 is: 167.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.60 : 173.18 = 111.74 : x
  2. Step 2: Convert to fraction form
    115.60/173.18 = 111.74/x
  3. Step 3: Cross multiply
    115.60x = 173.18 × 111.74
  4. Step 4: Simplify right side
    115.60x = 19,351.13
  5. Step 5: Solve for x
    x = 19,351.13/115.60
  6. Step 6: Final answer
    x = 167.40

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.