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Finding the Fourth Proportional to 115.23, 157.95 and 113.16

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Solution

The fourth proportional to 115.23, 157.95 and 113.16 is: 155.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.23 : 157.95 = 113.16 : x
  2. Step 2: Convert to fraction form
    115.23/157.95 = 113.16/x
  3. Step 3: Cross multiply
    115.23x = 157.95 × 113.16
  4. Step 4: Simplify right side
    115.23x = 17,873.62
  5. Step 5: Solve for x
    x = 17,873.62/115.23
  6. Step 6: Final answer
    x = 155.11

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.