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Finding the Fourth Proportional to 172.08, 237.42 and 106.47

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Solution

The fourth proportional to 172.08, 237.42 and 106.47 is: 146.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.08 : 237.42 = 106.47 : x
  2. Step 2: Convert to fraction form
    172.08/237.42 = 106.47/x
  3. Step 3: Cross multiply
    172.08x = 237.42 × 106.47
  4. Step 4: Simplify right side
    172.08x = 25,278.11
  5. Step 5: Solve for x
    x = 25,278.11/172.08
  6. Step 6: Final answer
    x = 146.90

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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.