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Finding the Fourth Proportional to 115,725.78, 159,700.14 and 67,983.48

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Solution

The fourth proportional to 115,725.78, 159,700.14 and 67,983.48 is: 93,816.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,725.78 : 159,700.14 = 67,983.48 : x
  2. Step 2: Convert to fraction form
    115,725.78/159,700.14 = 67,983.48/x
  3. Step 3: Cross multiply
    115,725.78x = 159,700.14 × 67,983.48
  4. Step 4: Simplify right side
    115,725.78x = 10,856,971,273.69
  5. Step 5: Solve for x
    x = 10,856,971,273.69/115,725.78
  6. Step 6: Final answer
    x = 93,816.36

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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.