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Finding the Fourth Proportional to 206,407.20, 309,610.80 and 127,675.20

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Solution

The fourth proportional to 206,407.20, 309,610.80 and 127,675.20 is: 191,512.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,407.20 : 309,610.80 = 127,675.20 : x
  2. Step 2: Convert to fraction form
    206,407.20/309,610.80 = 127,675.20/x
  3. Step 3: Cross multiply
    206,407.20x = 309,610.80 × 127,675.20
  4. Step 4: Simplify right side
    206,407.20x = 39,529,620,812.16
  5. Step 5: Solve for x
    x = 39,529,620,812.16/206,407.20
  6. Step 6: Final answer
    x = 191,512.80

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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.