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Finding the Fourth Proportional to 176.69, 264.93 and 85.39

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Solution

The fourth proportional to 176.69, 264.93 and 85.39 is: 128.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.69 : 264.93 = 85.39 : x
  2. Step 2: Convert to fraction form
    176.69/264.93 = 85.39/x
  3. Step 3: Cross multiply
    176.69x = 264.93 × 85.39
  4. Step 4: Simplify right side
    176.69x = 22,621.71
  5. Step 5: Solve for x
    x = 22,621.71/176.69
  6. Step 6: Final answer
    x = 128.03

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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.