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Finding the Fourth Proportional to 138,639.52, 207,959.37 and 33,458.50

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Solution

The fourth proportional to 138,639.52, 207,959.37 and 33,458.50 is: 50,187.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,639.52 : 207,959.37 = 33,458.50 : x
  2. Step 2: Convert to fraction form
    138,639.52/207,959.37 = 33,458.50/x
  3. Step 3: Cross multiply
    138,639.52x = 207,959.37 × 33,458.50
  4. Step 4: Simplify right side
    138,639.52x = 6,958,008,581.15
  5. Step 5: Solve for x
    x = 6,958,008,581.15/138,639.52
  6. Step 6: Final answer
    x = 50,187.77

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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.