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Finding the Fourth Proportional to 134.49, 185.56 and 79.21

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Solution

The fourth proportional to 134.49, 185.56 and 79.21 is: 109.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.49 : 185.56 = 79.21 : x
  2. Step 2: Convert to fraction form
    134.49/185.56 = 79.21/x
  3. Step 3: Cross multiply
    134.49x = 185.56 × 79.21
  4. Step 4: Simplify right side
    134.49x = 14,698.21
  5. Step 5: Solve for x
    x = 14,698.21/134.49
  6. Step 6: Final answer
    x = 109.29

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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.