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Finding the Fourth Proportional to 134.12, 185.07 and 78.08

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Solution

The fourth proportional to 134.12, 185.07 and 78.08 is: 107.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.12 : 185.07 = 78.08 : x
  2. Step 2: Convert to fraction form
    134.12/185.07 = 78.08/x
  3. Step 3: Cross multiply
    134.12x = 185.07 × 78.08
  4. Step 4: Simplify right side
    134.12x = 14,451.02
  5. Step 5: Solve for x
    x = 14,451.02/134.12
  6. Step 6: Final answer
    x = 107.75

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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.