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Finding the Fourth Proportional to 101.11, 139.53 and 62.30

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Solution

The fourth proportional to 101.11, 139.53 and 62.30 is: 85.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.11 : 139.53 = 62.30 : x
  2. Step 2: Convert to fraction form
    101.11/139.53 = 62.30/x
  3. Step 3: Cross multiply
    101.11x = 139.53 × 62.30
  4. Step 4: Simplify right side
    101.11x = 8,692.72
  5. Step 5: Solve for x
    x = 8,692.72/101.11
  6. Step 6: Final answer
    x = 85.97

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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.