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Finding the Fourth Proportional to 171.68, 236.58 and 145.76

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Solution

The fourth proportional to 171.68, 236.58 and 145.76 is: 200.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.68 : 236.58 = 145.76 : x
  2. Step 2: Convert to fraction form
    171.68/236.58 = 145.76/x
  3. Step 3: Cross multiply
    171.68x = 236.58 × 145.76
  4. Step 4: Simplify right side
    171.68x = 34,483.90
  5. Step 5: Solve for x
    x = 34,483.90/171.68
  6. Step 6: Final answer
    x = 200.86

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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.