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Finding the Fourth Proportional to 139,138.66, 208,724.62 and 49,162.75

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Solution

The fourth proportional to 139,138.66, 208,724.62 and 49,162.75 is: 73,750.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,138.66 : 208,724.62 = 49,162.75 : x
  2. Step 2: Convert to fraction form
    139,138.66/208,724.62 = 49,162.75/x
  3. Step 3: Cross multiply
    139,138.66x = 208,724.62 × 49,162.75
  4. Step 4: Simplify right side
    139,138.66x = 10,261,475,667.19
  5. Step 5: Solve for x
    x = 10,261,475,667.19/139,138.66
  6. Step 6: Final answer
    x = 73,750.00

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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.