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Finding the Fourth Proportional to 139.37, 208.93 and 58.27

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Solution

The fourth proportional to 139.37, 208.93 and 58.27 is: 87.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.37 : 208.93 = 58.27 : x
  2. Step 2: Convert to fraction form
    139.37/208.93 = 58.27/x
  3. Step 3: Cross multiply
    139.37x = 208.93 × 58.27
  4. Step 4: Simplify right side
    139.37x = 12,174.18
  5. Step 5: Solve for x
    x = 12,174.18/139.37
  6. Step 6: Final answer
    x = 87.35

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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.