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Finding the Fourth Proportional to 101.39, 139.90 and 59.93

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Solution

The fourth proportional to 101.39, 139.90 and 59.93 is: 82.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.39 : 139.90 = 59.93 : x
  2. Step 2: Convert to fraction form
    101.39/139.90 = 59.93/x
  3. Step 3: Cross multiply
    101.39x = 139.90 × 59.93
  4. Step 4: Simplify right side
    101.39x = 8,383.21
  5. Step 5: Solve for x
    x = 8,383.21/101.39
  6. Step 6: Final answer
    x = 82.68

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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.