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Finding the Fourth Proportional to 206,890.60, 310,044.30 and 127,769.80

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Solution

The fourth proportional to 206,890.60, 310,044.30 and 127,769.80 is: 191,474.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,890.60 : 310,044.30 = 127,769.80 : x
  2. Step 2: Convert to fraction form
    206,890.60/310,044.30 = 127,769.80/x
  3. Step 3: Cross multiply
    206,890.60x = 310,044.30 × 127,769.80
  4. Step 4: Simplify right side
    206,890.60x = 39,614,298,202.14
  5. Step 5: Solve for x
    x = 39,614,298,202.14/206,890.60
  6. Step 6: Final answer
    x = 191,474.62

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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.