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Finding the Fourth Proportional to 115.16, 171.63 and 114.20

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Solution

The fourth proportional to 115.16, 171.63 and 114.20 is: 170.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.16 : 171.63 = 114.20 : x
  2. Step 2: Convert to fraction form
    115.16/171.63 = 114.20/x
  3. Step 3: Cross multiply
    115.16x = 171.63 × 114.20
  4. Step 4: Simplify right side
    115.16x = 19,600.09
  5. Step 5: Solve for x
    x = 19,600.09/115.16
  6. Step 6: Final answer
    x = 170.21

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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.