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Finding the Fourth Proportional to 176.78, 265.33 and 90.17

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Solution

The fourth proportional to 176.78, 265.33 and 90.17 is: 135.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.78 : 265.33 = 90.17 : x
  2. Step 2: Convert to fraction form
    176.78/265.33 = 90.17/x
  3. Step 3: Cross multiply
    176.78x = 265.33 × 90.17
  4. Step 4: Simplify right side
    176.78x = 23,924.81
  5. Step 5: Solve for x
    x = 23,924.81/176.78
  6. Step 6: Final answer
    x = 135.34

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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.