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Finding the Fourth Proportional to 114, 158.40 and 112.94

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Solution

The fourth proportional to 114, 158.40 and 112.94 is: 156.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    114 : 158.40 = 112.94 : x
  2. Step 2: Convert to fraction form
    114/158.40 = 112.94/x
  3. Step 3: Cross multiply
    114x = 158.40 × 112.94
  4. Step 4: Simplify right side
    114x = 17,889.70
  5. Step 5: Solve for x
    x = 17,889.70/114
  6. Step 6: Final answer
    x = 156.93

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.