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Finding the Fourth Proportional to 61, 84.18 and 35.14

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Solution

The fourth proportional to 61, 84.18 and 35.14 is: 48.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    61 : 84.18 = 35.14 : x
  2. Step 2: Convert to fraction form
    61/84.18 = 35.14/x
  3. Step 3: Cross multiply
    61x = 84.18 × 35.14
  4. Step 4: Simplify right side
    61x = 2,958.09
  5. Step 5: Solve for x
    x = 2,958.09/61
  6. Step 6: Final answer
    x = 48.49

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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.