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Finding the Fourth Proportional to 181.95, 272.93 and 66.40

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Solution

The fourth proportional to 181.95, 272.93 and 66.40 is: 99.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.95 : 272.93 = 66.40 : x
  2. Step 2: Convert to fraction form
    181.95/272.93 = 66.40/x
  3. Step 3: Cross multiply
    181.95x = 272.93 × 66.40
  4. Step 4: Simplify right side
    181.95x = 18,122.55
  5. Step 5: Solve for x
    x = 18,122.55/181.95
  6. Step 6: Final answer
    x = 99.60

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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.