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Finding the Fourth Proportional to 139.98, 193.14 and 137.82

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Solution

The fourth proportional to 139.98, 193.14 and 137.82 is: 190.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.98 : 193.14 = 137.82 : x
  2. Step 2: Convert to fraction form
    139.98/193.14 = 137.82/x
  3. Step 3: Cross multiply
    139.98x = 193.14 × 137.82
  4. Step 4: Simplify right side
    139.98x = 26,618.55
  5. Step 5: Solve for x
    x = 26,618.55/139.98
  6. Step 6: Final answer
    x = 190.16

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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.