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Finding the Fourth Proportional to 115,856.88, 159,884.96 and 65,555.88

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Solution

The fourth proportional to 115,856.88, 159,884.96 and 65,555.88 is: 90,468.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,856.88 : 159,884.96 = 65,555.88 : x
  2. Step 2: Convert to fraction form
    115,856.88/159,884.96 = 65,555.88/x
  3. Step 3: Cross multiply
    115,856.88x = 159,884.96 × 65,555.88
  4. Step 4: Simplify right side
    115,856.88x = 10,481,399,251.56
  5. Step 5: Solve for x
    x = 10,481,399,251.56/115,856.88
  6. Step 6: Final answer
    x = 90,468.51

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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.