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Finding the Fourth Proportional to 140.79, 211.18 and 57.41

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Solution

The fourth proportional to 140.79, 211.18 and 57.41 is: 86.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.79 : 211.18 = 57.41 : x
  2. Step 2: Convert to fraction form
    140.79/211.18 = 57.41/x
  3. Step 3: Cross multiply
    140.79x = 211.18 × 57.41
  4. Step 4: Simplify right side
    140.79x = 12,122.79
  5. Step 5: Solve for x
    x = 12,122.79/140.79
  6. Step 6: Final answer
    x = 86.11

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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.