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Finding the Fourth Proportional to 173.10, 237.90 and 154.74

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Solution

The fourth proportional to 173.10, 237.90 and 154.74 is: 212.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.10 : 237.90 = 154.74 : x
  2. Step 2: Convert to fraction form
    173.10/237.90 = 154.74/x
  3. Step 3: Cross multiply
    173.10x = 237.90 × 154.74
  4. Step 4: Simplify right side
    173.10x = 36,812.65
  5. Step 5: Solve for x
    x = 36,812.65/173.10
  6. Step 6: Final answer
    x = 212.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.