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Finding the Fourth Proportional to 61.08, 91.38 and 44.72

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Solution

The fourth proportional to 61.08, 91.38 and 44.72 is: 66.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.08 : 91.38 = 44.72 : x
  2. Step 2: Convert to fraction form
    61.08/91.38 = 44.72/x
  3. Step 3: Cross multiply
    61.08x = 91.38 × 44.72
  4. Step 4: Simplify right side
    61.08x = 4,086.51
  5. Step 5: Solve for x
    x = 4,086.51/61.08
  6. Step 6: Final answer
    x = 66.90

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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.