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Finding the Fourth Proportional to 176.66, 243.78 and 111.20

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Solution

The fourth proportional to 176.66, 243.78 and 111.20 is: 153.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.66 : 243.78 = 111.20 : x
  2. Step 2: Convert to fraction form
    176.66/243.78 = 111.20/x
  3. Step 3: Cross multiply
    176.66x = 243.78 × 111.20
  4. Step 4: Simplify right side
    176.66x = 27,108.34
  5. Step 5: Solve for x
    x = 27,108.34/176.66
  6. Step 6: Final answer
    x = 153.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.