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Finding the Fourth Proportional to 153.75, 230.08 and 113.07

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Solution

The fourth proportional to 153.75, 230.08 and 113.07 is: 169.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.75 : 230.08 = 113.07 : x
  2. Step 2: Convert to fraction form
    153.75/230.08 = 113.07/x
  3. Step 3: Cross multiply
    153.75x = 230.08 × 113.07
  4. Step 4: Simplify right side
    153.75x = 26,014.96
  5. Step 5: Solve for x
    x = 26,014.96/153.75
  6. Step 6: Final answer
    x = 169.21

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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.