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Finding the Fourth Proportional to 115,789.44, 159,772.32 and 65,487.36

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Solution

The fourth proportional to 115,789.44, 159,772.32 and 65,487.36 is: 90,362.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,789.44 : 159,772.32 = 65,487.36 : x
  2. Step 2: Convert to fraction form
    115,789.44/159,772.32 = 65,487.36/x
  3. Step 3: Cross multiply
    115,789.44x = 159,772.32 × 65,487.36
  4. Step 4: Simplify right side
    115,789.44x = 10,463,067,437.88
  5. Step 5: Solve for x
    x = 10,463,067,437.88/115,789.44
  6. Step 6: Final answer
    x = 90,362.88

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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.