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Finding the Fourth Proportional to 61.06, 91.58 and 20.52

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Solution

The fourth proportional to 61.06, 91.58 and 20.52 is: 30.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.06 : 91.58 = 20.52 : x
  2. Step 2: Convert to fraction form
    61.06/91.58 = 20.52/x
  3. Step 3: Cross multiply
    61.06x = 91.58 × 20.52
  4. Step 4: Simplify right side
    61.06x = 1,879.22
  5. Step 5: Solve for x
    x = 1,879.22/61.06
  6. Step 6: Final answer
    x = 30.78

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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.