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Finding the Fourth Proportional to 139,446.75, 209,928.86 and 127,046.46

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Solution

The fourth proportional to 139,446.75, 209,928.86 and 127,046.46 is: 191,260.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,446.75 : 209,928.86 = 127,046.46 : x
  2. Step 2: Convert to fraction form
    139,446.75/209,928.86 = 127,046.46/x
  3. Step 3: Cross multiply
    139,446.75x = 209,928.86 × 127,046.46
  4. Step 4: Simplify right side
    139,446.75x = 26,670,718,832.45
  5. Step 5: Solve for x
    x = 26,670,718,832.45/139,446.75
  6. Step 6: Final answer
    x = 191,260.96

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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.