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Finding the Fourth Proportional to 185.48, 278.02 and 89.18

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Solution

The fourth proportional to 185.48, 278.02 and 89.18 is: 133.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.48 : 278.02 = 89.18 : x
  2. Step 2: Convert to fraction form
    185.48/278.02 = 89.18/x
  3. Step 3: Cross multiply
    185.48x = 278.02 × 89.18
  4. Step 4: Simplify right side
    185.48x = 24,793.82
  5. Step 5: Solve for x
    x = 24,793.82/185.48
  6. Step 6: Final answer
    x = 133.67

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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.