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Finding the Fourth Proportional to 173.48, 239.24 and 111.20

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Solution

The fourth proportional to 173.48, 239.24 and 111.20 is: 153.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.48 : 239.24 = 111.20 : x
  2. Step 2: Convert to fraction form
    173.48/239.24 = 111.20/x
  3. Step 3: Cross multiply
    173.48x = 239.24 × 111.20
  4. Step 4: Simplify right side
    173.48x = 26,601.94
  5. Step 5: Solve for x
    x = 26,601.94/173.48
  6. Step 6: Final answer
    x = 153.35

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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.