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Finding the Fourth Proportional to 183.38, 274.98 and 87.20

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Solution

The fourth proportional to 183.38, 274.98 and 87.20 is: 130.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.38 : 274.98 = 87.20 : x
  2. Step 2: Convert to fraction form
    183.38/274.98 = 87.20/x
  3. Step 3: Cross multiply
    183.38x = 274.98 × 87.20
  4. Step 4: Simplify right side
    183.38x = 23,978.26
  5. Step 5: Solve for x
    x = 23,978.26/183.38
  6. Step 6: Final answer
    x = 130.76

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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.