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Finding the Fourth Proportional to 61.43, 84.77 and 35.21

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Solution

The fourth proportional to 61.43, 84.77 and 35.21 is: 48.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.43 : 84.77 = 35.21 : x
  2. Step 2: Convert to fraction form
    61.43/84.77 = 35.21/x
  3. Step 3: Cross multiply
    61.43x = 84.77 × 35.21
  4. Step 4: Simplify right side
    61.43x = 2,984.33
  5. Step 5: Solve for x
    x = 2,984.33/61.43
  6. Step 6: Final answer
    x = 48.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.