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Finding the Fourth Proportional to 139.54, 210.16 and 125.98

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Solution

The fourth proportional to 139.54, 210.16 and 125.98 is: 189.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.54 : 210.16 = 125.98 : x
  2. Step 2: Convert to fraction form
    139.54/210.16 = 125.98/x
  3. Step 3: Cross multiply
    139.54x = 210.16 × 125.98
  4. Step 4: Simplify right side
    139.54x = 26,475.65
  5. Step 5: Solve for x
    x = 26,475.65/139.54
  6. Step 6: Final answer
    x = 189.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.