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Finding the Fourth Proportional to 134.74, 186.12 and 113.98

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Solution

The fourth proportional to 134.74, 186.12 and 113.98 is: 157.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.74 : 186.12 = 113.98 : x
  2. Step 2: Convert to fraction form
    134.74/186.12 = 113.98/x
  3. Step 3: Cross multiply
    134.74x = 186.12 × 113.98
  4. Step 4: Simplify right side
    134.74x = 21,213.96
  5. Step 5: Solve for x
    x = 21,213.96/134.74
  6. Step 6: Final answer
    x = 157.44

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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.