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Finding the Fourth Proportional to 114.42, 157.98 and 67.80

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Solution

The fourth proportional to 114.42, 157.98 and 67.80 is: 93.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.42 : 157.98 = 67.80 : x
  2. Step 2: Convert to fraction form
    114.42/157.98 = 67.80/x
  3. Step 3: Cross multiply
    114.42x = 157.98 × 67.80
  4. Step 4: Simplify right side
    114.42x = 10,711.04
  5. Step 5: Solve for x
    x = 10,711.04/114.42
  6. Step 6: Final answer
    x = 93.61

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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.