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Finding the Fourth Proportional to 118,725.65, 177,805.78 and 68,700.32

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Solution

The fourth proportional to 118,725.65, 177,805.78 and 68,700.32 is: 102,886.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,725.65 : 177,805.78 = 68,700.32 : x
  2. Step 2: Convert to fraction form
    118,725.65/177,805.78 = 68,700.32/x
  3. Step 3: Cross multiply
    118,725.65x = 177,805.78 × 68,700.32
  4. Step 4: Simplify right side
    118,725.65x = 12,215,313,367.58
  5. Step 5: Solve for x
    x = 12,215,313,367.58/118,725.65
  6. Step 6: Final answer
    x = 102,886.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.