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Finding the Fourth Proportional to 141.31, 212.02 and 49.95

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Solution

The fourth proportional to 141.31, 212.02 and 49.95 is: 74.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.31 : 212.02 = 49.95 : x
  2. Step 2: Convert to fraction form
    141.31/212.02 = 49.95/x
  3. Step 3: Cross multiply
    141.31x = 212.02 × 49.95
  4. Step 4: Simplify right side
    141.31x = 10,590.27
  5. Step 5: Solve for x
    x = 10,590.27/141.31
  6. Step 6: Final answer
    x = 74.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.