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Finding the Fourth Proportional to 181.50, 272.30 and 59.78

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Solution

The fourth proportional to 181.50, 272.30 and 59.78 is: 89.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.50 : 272.30 = 59.78 : x
  2. Step 2: Convert to fraction form
    181.50/272.30 = 59.78/x
  3. Step 3: Cross multiply
    181.50x = 272.30 × 59.78
  4. Step 4: Simplify right side
    181.50x = 16,276.43
  5. Step 5: Solve for x
    x = 16,276.43/181.50
  6. Step 6: Final answer
    x = 89.68

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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.