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Finding the Fourth Proportional to 120.80, 181.12 and 52.32

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Solution

The fourth proportional to 120.80, 181.12 and 52.32 is: 78.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.80 : 181.12 = 52.32 : x
  2. Step 2: Convert to fraction form
    120.80/181.12 = 52.32/x
  3. Step 3: Cross multiply
    120.80x = 181.12 × 52.32
  4. Step 4: Simplify right side
    120.80x = 9,476.20
  5. Step 5: Solve for x
    x = 9,476.20/120.80
  6. Step 6: Final answer
    x = 78.45

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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.