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Finding the Fourth Proportional to 172.81, 237.75 and 159.76

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Solution

The fourth proportional to 172.81, 237.75 and 159.76 is: 219.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.81 : 237.75 = 159.76 : x
  2. Step 2: Convert to fraction form
    172.81/237.75 = 159.76/x
  3. Step 3: Cross multiply
    172.81x = 237.75 × 159.76
  4. Step 4: Simplify right side
    172.81x = 37,982.94
  5. Step 5: Solve for x
    x = 37,982.94/172.81
  6. Step 6: Final answer
    x = 219.80

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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.