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Finding the Fourth Proportional to 201,979.54, 302,866.05 and 66,994.88

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Solution

The fourth proportional to 201,979.54, 302,866.05 and 66,994.88 is: 100,458.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,979.54 : 302,866.05 = 66,994.88 : x
  2. Step 2: Convert to fraction form
    201,979.54/302,866.05 = 66,994.88/x
  3. Step 3: Cross multiply
    201,979.54x = 302,866.05 × 66,994.88
  4. Step 4: Simplify right side
    201,979.54x = 20,290,475,116.35
  5. Step 5: Solve for x
    x = 20,290,475,116.35/201,979.54
  6. Step 6: Final answer
    x = 100,458.07

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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.