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Finding the Fourth Proportional to 142.64, 195.65 and 134.80

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Solution

The fourth proportional to 142.64, 195.65 and 134.80 is: 184.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.64 : 195.65 = 134.80 : x
  2. Step 2: Convert to fraction form
    142.64/195.65 = 134.80/x
  3. Step 3: Cross multiply
    142.64x = 195.65 × 134.80
  4. Step 4: Simplify right side
    142.64x = 26,372.46
  5. Step 5: Solve for x
    x = 26,372.46/142.64
  6. Step 6: Final answer
    x = 184.88

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.