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Finding the Fourth Proportional to 176.82, 265.29 and 99.78

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Solution

The fourth proportional to 176.82, 265.29 and 99.78 is: 149.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.82 : 265.29 = 99.78 : x
  2. Step 2: Convert to fraction form
    176.82/265.29 = 99.78/x
  3. Step 3: Cross multiply
    176.82x = 265.29 × 99.78
  4. Step 4: Simplify right side
    176.82x = 26,470.64
  5. Step 5: Solve for x
    x = 26,470.64/176.82
  6. Step 6: Final answer
    x = 149.70

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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.