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Finding the Fourth Proportional to 181.40, 272.13 and 73.19

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Solution

The fourth proportional to 181.40, 272.13 and 73.19 is: 109.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.40 : 272.13 = 73.19 : x
  2. Step 2: Convert to fraction form
    181.40/272.13 = 73.19/x
  3. Step 3: Cross multiply
    181.40x = 272.13 × 73.19
  4. Step 4: Simplify right side
    181.40x = 19,915.47
  5. Step 5: Solve for x
    x = 19,915.47/181.40
  6. Step 6: Final answer
    x = 109.79

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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.