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Finding the Fourth Proportional to 134.64, 185.79 and 76.41

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Solution

The fourth proportional to 134.64, 185.79 and 76.41 is: 105.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.64 : 185.79 = 76.41 : x
  2. Step 2: Convert to fraction form
    134.64/185.79 = 76.41/x
  3. Step 3: Cross multiply
    134.64x = 185.79 × 76.41
  4. Step 4: Simplify right side
    134.64x = 14,196.21
  5. Step 5: Solve for x
    x = 14,196.21/134.64
  6. Step 6: Final answer
    x = 105.44

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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.