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Finding the Fourth Proportional to 112.42, 155.07 and 68.14

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Solution

The fourth proportional to 112.42, 155.07 and 68.14 is: 93.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.42 : 155.07 = 68.14 : x
  2. Step 2: Convert to fraction form
    112.42/155.07 = 68.14/x
  3. Step 3: Cross multiply
    112.42x = 155.07 × 68.14
  4. Step 4: Simplify right side
    112.42x = 10,566.47
  5. Step 5: Solve for x
    x = 10,566.47/112.42
  6. Step 6: Final answer
    x = 93.99

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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.