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Finding the Fourth Proportional to 80.73, 120.87 and 46.35

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Solution

The fourth proportional to 80.73, 120.87 and 46.35 is: 69.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.73 : 120.87 = 46.35 : x
  2. Step 2: Convert to fraction form
    80.73/120.87 = 46.35/x
  3. Step 3: Cross multiply
    80.73x = 120.87 × 46.35
  4. Step 4: Simplify right side
    80.73x = 5,602.32
  5. Step 5: Solve for x
    x = 5,602.32/80.73
  6. Step 6: Final answer
    x = 69.40

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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.