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Finding the Fourth Proportional to 139.58, 209.33 and 58.37

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Solution

The fourth proportional to 139.58, 209.33 and 58.37 is: 87.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.58 : 209.33 = 58.37 : x
  2. Step 2: Convert to fraction form
    139.58/209.33 = 58.37/x
  3. Step 3: Cross multiply
    139.58x = 209.33 × 58.37
  4. Step 4: Simplify right side
    139.58x = 12,218.30
  5. Step 5: Solve for x
    x = 12,218.30/139.58
  6. Step 6: Final answer
    x = 87.54

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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.