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Finding the Fourth Proportional to 115,273.56, 159,078.73 and 64,972.56

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Solution

The fourth proportional to 115,273.56, 159,078.73 and 64,972.56 is: 89,662.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,273.56 : 159,078.73 = 64,972.56 : x
  2. Step 2: Convert to fraction form
    115,273.56/159,078.73 = 64,972.56/x
  3. Step 3: Cross multiply
    115,273.56x = 159,078.73 × 64,972.56
  4. Step 4: Simplify right side
    115,273.56x = 10,335,752,329.65
  5. Step 5: Solve for x
    x = 10,335,752,329.65/115,273.56
  6. Step 6: Final answer
    x = 89,662.82

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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.