Home / 81,947.92-113,013.48-53,643.28

Finding the Fourth Proportional to 81,947.92, 113,013.48 and 53,643.28

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Solution

The fourth proportional to 81,947.92, 113,013.48 and 53,643.28 is: 73,978.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,947.92 : 113,013.48 = 53,643.28 : x
  2. Step 2: Convert to fraction form
    81,947.92/113,013.48 = 53,643.28/x
  3. Step 3: Cross multiply
    81,947.92x = 113,013.48 × 53,643.28
  4. Step 4: Simplify right side
    81,947.92x = 6,062,413,751.41
  5. Step 5: Solve for x
    x = 6,062,413,751.41/81,947.92
  6. Step 6: Final answer
    x = 73,978.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.