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Finding the Fourth Proportional to 141.92, 211.30 and 141.20

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Solution

The fourth proportional to 141.92, 211.30 and 141.20 is: 210.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.92 : 211.30 = 141.20 : x
  2. Step 2: Convert to fraction form
    141.92/211.30 = 141.20/x
  3. Step 3: Cross multiply
    141.92x = 211.30 × 141.20
  4. Step 4: Simplify right side
    141.92x = 29,835.56
  5. Step 5: Solve for x
    x = 29,835.56/141.92
  6. Step 6: Final answer
    x = 210.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.