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Finding the Third Proportional to 75.56 and 178.50

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Solution

The third proportional to 75.56 and 178.50 is: 421.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.56 : 178.50 = 178.50 : x
  2. Step 2: Convert to fraction form
    75.56/178.50 = 178.50/x
  3. Step 3: Cross multiply
    75.56x = 178.50 × 178.50
  4. Step 4: Simplify right side
    75.56x = 31,862.25
  5. Step 5: Solve for x
    x = 31,862.25/75.56
  6. Step 6: Final answer
    x = 421.67

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.