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Finding the Fourth Proportional to 176.40, 264.69 and 85.10

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Solution

The fourth proportional to 176.40, 264.69 and 85.10 is: 127.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.40 : 264.69 = 85.10 : x
  2. Step 2: Convert to fraction form
    176.40/264.69 = 85.10/x
  3. Step 3: Cross multiply
    176.40x = 264.69 × 85.10
  4. Step 4: Simplify right side
    176.40x = 22,523.80
  5. Step 5: Solve for x
    x = 22,523.80/176.40
  6. Step 6: Final answer
    x = 127.69

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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.