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Finding the Fourth Proportional to 80.15, 110.60 and 46.95

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Solution

The fourth proportional to 80.15, 110.60 and 46.95 is: 64.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.15 : 110.60 = 46.95 : x
  2. Step 2: Convert to fraction form
    80.15/110.60 = 46.95/x
  3. Step 3: Cross multiply
    80.15x = 110.60 × 46.95
  4. Step 4: Simplify right side
    80.15x = 5,192.67
  5. Step 5: Solve for x
    x = 5,192.67/80.15
  6. Step 6: Final answer
    x = 64.79

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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.