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Finding the Fourth Proportional to 137.86, 190.29 and 94.22

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Solution

The fourth proportional to 137.86, 190.29 and 94.22 is: 130.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.86 : 190.29 = 94.22 : x
  2. Step 2: Convert to fraction form
    137.86/190.29 = 94.22/x
  3. Step 3: Cross multiply
    137.86x = 190.29 × 94.22
  4. Step 4: Simplify right side
    137.86x = 17,928.65
  5. Step 5: Solve for x
    x = 17,928.65/137.86
  6. Step 6: Final answer
    x = 130.05

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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.