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Finding the Fourth Proportional to 171.78, 236.52 and 145.59

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Solution

The fourth proportional to 171.78, 236.52 and 145.59 is: 200.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.78 : 236.52 = 145.59 : x
  2. Step 2: Convert to fraction form
    171.78/236.52 = 145.59/x
  3. Step 3: Cross multiply
    171.78x = 236.52 × 145.59
  4. Step 4: Simplify right side
    171.78x = 34,434.95
  5. Step 5: Solve for x
    x = 34,434.95/171.78
  6. Step 6: Final answer
    x = 200.46

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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.