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Finding the Fourth Proportional to 181.40, 272.08 and 51.39

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Solution

The fourth proportional to 181.40, 272.08 and 51.39 is: 77.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.40 : 272.08 = 51.39 : x
  2. Step 2: Convert to fraction form
    181.40/272.08 = 51.39/x
  3. Step 3: Cross multiply
    181.40x = 272.08 × 51.39
  4. Step 4: Simplify right side
    181.40x = 13,982.19
  5. Step 5: Solve for x
    x = 13,982.19/181.40
  6. Step 6: Final answer
    x = 77.08

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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.