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Finding the Fourth Proportional to 173.45, 260.03 and 86.67

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Solution

The fourth proportional to 173.45, 260.03 and 86.67 is: 129.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.45 : 260.03 = 86.67 : x
  2. Step 2: Convert to fraction form
    173.45/260.03 = 86.67/x
  3. Step 3: Cross multiply
    173.45x = 260.03 × 86.67
  4. Step 4: Simplify right side
    173.45x = 22,537.34
  5. Step 5: Solve for x
    x = 22,537.34/173.45
  6. Step 6: Final answer
    x = 129.94

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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.