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Finding the Fourth Proportional to 206,905.80, 310,358.70 and 82,246.80

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Solution

The fourth proportional to 206,905.80, 310,358.70 and 82,246.80 is: 123,370.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,905.80 : 310,358.70 = 82,246.80 : x
  2. Step 2: Convert to fraction form
    206,905.80/310,358.70 = 82,246.80/x
  3. Step 3: Cross multiply
    206,905.80x = 310,358.70 × 82,246.80
  4. Step 4: Simplify right side
    206,905.80x = 25,526,009,927.16
  5. Step 5: Solve for x
    x = 25,526,009,927.16/206,905.80
  6. Step 6: Final answer
    x = 123,370.20

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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.