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Finding the Fourth Proportional to 176.64, 243.80 and 111.20

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Solution

The fourth proportional to 176.64, 243.80 and 111.20 is: 153.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.64 : 243.80 = 111.20 : x
  2. Step 2: Convert to fraction form
    176.64/243.80 = 111.20/x
  3. Step 3: Cross multiply
    176.64x = 243.80 × 111.20
  4. Step 4: Simplify right side
    176.64x = 27,110.56
  5. Step 5: Solve for x
    x = 27,110.56/176.64
  6. Step 6: Final answer
    x = 153.48

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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.