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Finding the Fourth Proportional to 176.45, 264.59 and 85.15

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Solution

The fourth proportional to 176.45, 264.59 and 85.15 is: 127.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.45 : 264.59 = 85.15 : x
  2. Step 2: Convert to fraction form
    176.45/264.59 = 85.15/x
  3. Step 3: Cross multiply
    176.45x = 264.59 × 85.15
  4. Step 4: Simplify right side
    176.45x = 22,528.09
  5. Step 5: Solve for x
    x = 22,528.09/176.45
  6. Step 6: Final answer
    x = 127.67

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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.