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Finding the Fourth Proportional to 114.50, 170.69 and 93.85

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Solution

The fourth proportional to 114.50, 170.69 and 93.85 is: 139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.50 : 170.69 = 93.85 : x
  2. Step 2: Convert to fraction form
    114.50/170.69 = 93.85/x
  3. Step 3: Cross multiply
    114.50x = 170.69 × 93.85
  4. Step 4: Simplify right side
    114.50x = 16,018.36
  5. Step 5: Solve for x
    x = 16,018.36/114.50
  6. Step 6: Final answer
    x = 139.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.