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Finding the Fourth Proportional to 139.17, 208.44 and 98.46

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Solution

The fourth proportional to 139.17, 208.44 and 98.46 is: 147.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.17 : 208.44 = 98.46 : x
  2. Step 2: Convert to fraction form
    139.17/208.44 = 98.46/x
  3. Step 3: Cross multiply
    139.17x = 208.44 × 98.46
  4. Step 4: Simplify right side
    139.17x = 20,523.00
  5. Step 5: Solve for x
    x = 20,523.00/139.17
  6. Step 6: Final answer
    x = 147.47

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.