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Finding the Fourth Proportional to 206,020.80, 309,225.60 and 127,288.80

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Solution

The fourth proportional to 206,020.80, 309,225.60 and 127,288.80 is: 191,053.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,020.80 : 309,225.60 = 127,288.80 : x
  2. Step 2: Convert to fraction form
    206,020.80/309,225.60 = 127,288.80/x
  3. Step 3: Cross multiply
    206,020.80x = 309,225.60 × 127,288.80
  4. Step 4: Simplify right side
    206,020.80x = 39,360,955,553.28
  5. Step 5: Solve for x
    x = 39,360,955,553.28/206,020.80
  6. Step 6: Final answer
    x = 191,053.31

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1.5x scale

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.