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Finding the Fourth Proportional to 362,661.28, 543,772 and 138,036.94

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Solution

The fourth proportional to 362,661.28, 543,772 and 138,036.94 is: 206,971.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    362,661.28 : 543,772 = 138,036.94 : x
  2. Step 2: Convert to fraction form
    362,661.28/543,772 = 138,036.94/x
  3. Step 3: Cross multiply
    362,661.28x = 543,772 × 138,036.94
  4. Step 4: Simplify right side
    362,661.28x = 75,060,622,937.68
  5. Step 5: Solve for x
    x = 75,060,622,937.68/362,661.28
  6. Step 6: Final answer
    x = 206,971.70

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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.