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Finding the Fourth Proportional to 141.56, 195.12 and 112.40

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Solution

The fourth proportional to 141.56, 195.12 and 112.40 is: 154.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.56 : 195.12 = 112.40 : x
  2. Step 2: Convert to fraction form
    141.56/195.12 = 112.40/x
  3. Step 3: Cross multiply
    141.56x = 195.12 × 112.40
  4. Step 4: Simplify right side
    141.56x = 21,931.49
  5. Step 5: Solve for x
    x = 21,931.49/141.56
  6. Step 6: Final answer
    x = 154.93

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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.