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Finding the Fourth Proportional to 250.05, 345.11 and 139.54

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Solution

The fourth proportional to 250.05, 345.11 and 139.54 is: 192.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.05 : 345.11 = 139.54 : x
  2. Step 2: Convert to fraction form
    250.05/345.11 = 139.54/x
  3. Step 3: Cross multiply
    250.05x = 345.11 × 139.54
  4. Step 4: Simplify right side
    250.05x = 48,154.62
  5. Step 5: Solve for x
    x = 48,154.62/250.05
  6. Step 6: Final answer
    x = 192.58

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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.