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Finding the Fourth Proportional to 141.29, 212.33 and 83.51

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Solution

The fourth proportional to 141.29, 212.33 and 83.51 is: 125.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.29 : 212.33 = 83.51 : x
  2. Step 2: Convert to fraction form
    141.29/212.33 = 83.51/x
  3. Step 3: Cross multiply
    141.29x = 212.33 × 83.51
  4. Step 4: Simplify right side
    141.29x = 17,731.79
  5. Step 5: Solve for x
    x = 17,731.79/141.29
  6. Step 6: Final answer
    x = 125.50

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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.