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Finding the Fourth Proportional to 115.39, 173.13 and 64.09

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Solution

The fourth proportional to 115.39, 173.13 and 64.09 is: 96.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.39 : 173.13 = 64.09 : x
  2. Step 2: Convert to fraction form
    115.39/173.13 = 64.09/x
  3. Step 3: Cross multiply
    115.39x = 173.13 × 64.09
  4. Step 4: Simplify right side
    115.39x = 11,095.90
  5. Step 5: Solve for x
    x = 11,095.90/115.39
  6. Step 6: Final answer
    x = 96.16

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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.