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Finding the Fourth Proportional to 61.08, 84.28 and 37.76

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Solution

The fourth proportional to 61.08, 84.28 and 37.76 is: 52.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.08 : 84.28 = 37.76 : x
  2. Step 2: Convert to fraction form
    61.08/84.28 = 37.76/x
  3. Step 3: Cross multiply
    61.08x = 84.28 × 37.76
  4. Step 4: Simplify right side
    61.08x = 3,182.62
  5. Step 5: Solve for x
    x = 3,182.62/61.08
  6. Step 6: Final answer
    x = 52.11

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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.