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Finding the Fourth Proportional to 141.22, 211.48 and 83.30

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Solution

The fourth proportional to 141.22, 211.48 and 83.30 is: 124.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.22 : 211.48 = 83.30 : x
  2. Step 2: Convert to fraction form
    141.22/211.48 = 83.30/x
  3. Step 3: Cross multiply
    141.22x = 211.48 × 83.30
  4. Step 4: Simplify right side
    141.22x = 17,615.02
  5. Step 5: Solve for x
    x = 17,615.02/141.22
  6. Step 6: Final answer
    x = 124.74

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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.