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Finding the Fourth Proportional to 172.30, 237.86 and 154.08

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Solution

The fourth proportional to 172.30, 237.86 and 154.08 is: 212.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.30 : 237.86 = 154.08 : x
  2. Step 2: Convert to fraction form
    172.30/237.86 = 154.08/x
  3. Step 3: Cross multiply
    172.30x = 237.86 × 154.08
  4. Step 4: Simplify right side
    172.30x = 36,649.47
  5. Step 5: Solve for x
    x = 36,649.47/172.30
  6. Step 6: Final answer
    x = 212.71

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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.