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Finding the Fourth Proportional to 139.48, 208.98 and 93.76

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Solution

The fourth proportional to 139.48, 208.98 and 93.76 is: 140.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.48 : 208.98 = 93.76 : x
  2. Step 2: Convert to fraction form
    139.48/208.98 = 93.76/x
  3. Step 3: Cross multiply
    139.48x = 208.98 × 93.76
  4. Step 4: Simplify right side
    139.48x = 19,593.96
  5. Step 5: Solve for x
    x = 19,593.96/139.48
  6. Step 6: Final answer
    x = 140.48

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Why These Related Problems?

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