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Finding the Fourth Proportional to 171.45, 236.25 and 145.13

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Solution

The fourth proportional to 171.45, 236.25 and 145.13 is: 199.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.45 : 236.25 = 145.13 : x
  2. Step 2: Convert to fraction form
    171.45/236.25 = 145.13/x
  3. Step 3: Cross multiply
    171.45x = 236.25 × 145.13
  4. Step 4: Simplify right side
    171.45x = 34,285.78
  5. Step 5: Solve for x
    x = 34,285.78/171.45
  6. Step 6: Final answer
    x = 199.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.