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Finding the Fourth Proportional to 250.09, 345.11 and 139.56

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Solution

The fourth proportional to 250.09, 345.11 and 139.56 is: 192.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.09 : 345.11 = 139.56 : x
  2. Step 2: Convert to fraction form
    250.09/345.11 = 139.56/x
  3. Step 3: Cross multiply
    250.09x = 345.11 × 139.56
  4. Step 4: Simplify right side
    250.09x = 48,162.51
  5. Step 5: Solve for x
    x = 48,162.51/250.09
  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.