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Finding the Fourth Proportional to 139.51, 209.27 and 58.24

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Solution

The fourth proportional to 139.51, 209.27 and 58.24 is: 87.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.51 : 209.27 = 58.24 : x
  2. Step 2: Convert to fraction form
    139.51/209.27 = 58.24/x
  3. Step 3: Cross multiply
    139.51x = 209.27 × 58.24
  4. Step 4: Simplify right side
    139.51x = 12,187.88
  5. Step 5: Solve for x
    x = 12,187.88/139.51
  6. Step 6: Final answer
    x = 87.36

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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.