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Finding the Fourth Proportional to 176.90, 265.44 and 85.62

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Solution

The fourth proportional to 176.90, 265.44 and 85.62 is: 128.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.90 : 265.44 = 85.62 : x
  2. Step 2: Convert to fraction form
    176.90/265.44 = 85.62/x
  3. Step 3: Cross multiply
    176.90x = 265.44 × 85.62
  4. Step 4: Simplify right side
    176.90x = 22,726.97
  5. Step 5: Solve for x
    x = 22,726.97/176.90
  6. Step 6: Final answer
    x = 128.47

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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.