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Finding the Fourth Proportional to 185.42, 278.10 and 57.18

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Solution

The fourth proportional to 185.42, 278.10 and 57.18 is: 85.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.42 : 278.10 = 57.18 : x
  2. Step 2: Convert to fraction form
    185.42/278.10 = 57.18/x
  3. Step 3: Cross multiply
    185.42x = 278.10 × 57.18
  4. Step 4: Simplify right side
    185.42x = 15,901.76
  5. Step 5: Solve for x
    x = 15,901.76/185.42
  6. Step 6: Final answer
    x = 85.76

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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.