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Finding the Fourth Proportional to 134.72, 185.79 and 93.21

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Solution

The fourth proportional to 134.72, 185.79 and 93.21 is: 128.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.72 : 185.79 = 93.21 : x
  2. Step 2: Convert to fraction form
    134.72/185.79 = 93.21/x
  3. Step 3: Cross multiply
    134.72x = 185.79 × 93.21
  4. Step 4: Simplify right side
    134.72x = 17,317.49
  5. Step 5: Solve for x
    x = 17,317.49/134.72
  6. Step 6: Final answer
    x = 128.54

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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.