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Finding the Fourth Proportional to 206,554.20, 309,831.30 and 66,411.24

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Solution

The fourth proportional to 206,554.20, 309,831.30 and 66,411.24 is: 99,616.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,554.20 : 309,831.30 = 66,411.24 : x
  2. Step 2: Convert to fraction form
    206,554.20/309,831.30 = 66,411.24/x
  3. Step 3: Cross multiply
    206,554.20x = 309,831.30 × 66,411.24
  4. Step 4: Simplify right side
    206,554.20x = 20,576,280,823.81
  5. Step 5: Solve for x
    x = 20,576,280,823.81/206,554.20
  6. Step 6: Final answer
    x = 99,616.86

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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.