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Finding the Fourth Proportional to 172, 237.56 and 139.48

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Solution

The fourth proportional to 172, 237.56 and 139.48 is: 192.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    172 : 237.56 = 139.48 : x
  2. Step 2: Convert to fraction form
    172/237.56 = 139.48/x
  3. Step 3: Cross multiply
    172x = 237.56 × 139.48
  4. Step 4: Simplify right side
    172x = 33,134.87
  5. Step 5: Solve for x
    x = 33,134.87/172
  6. Step 6: Final answer
    x = 192.64

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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.