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Finding the Fourth Proportional to 114.92, 158.56 and 85.80

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Solution

The fourth proportional to 114.92, 158.56 and 85.80 is: 118.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.92 : 158.56 = 85.80 : x
  2. Step 2: Convert to fraction form
    114.92/158.56 = 85.80/x
  3. Step 3: Cross multiply
    114.92x = 158.56 × 85.80
  4. Step 4: Simplify right side
    114.92x = 13,604.45
  5. Step 5: Solve for x
    x = 13,604.45/114.92
  6. Step 6: Final answer
    x = 118.38

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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.