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Finding the Fourth Proportional to 115,920.52, 159,970.98 and 68,175.88

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Solution

The fourth proportional to 115,920.52, 159,970.98 and 68,175.88 is: 94,083.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,920.52 : 159,970.98 = 68,175.88 : x
  2. Step 2: Convert to fraction form
    115,920.52/159,970.98 = 68,175.88/x
  3. Step 3: Cross multiply
    115,920.52x = 159,970.98 × 68,175.88
  4. Step 4: Simplify right side
    115,920.52x = 10,906,162,335.96
  5. Step 5: Solve for x
    x = 10,906,162,335.96/115,920.52
  6. Step 6: Final answer
    x = 94,083.10

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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.