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Finding the Fourth Proportional to 206,812.58, 285,510.20 and 139,185.07

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Solution

The fourth proportional to 206,812.58, 285,510.20 and 139,185.07 is: 192,148.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,812.58 : 285,510.20 = 139,185.07 : x
  2. Step 2: Convert to fraction form
    206,812.58/285,510.20 = 139,185.07/x
  3. Step 3: Cross multiply
    206,812.58x = 285,510.20 × 139,185.07
  4. Step 4: Simplify right side
    206,812.58x = 39,738,755,763.01
  5. Step 5: Solve for x
    x = 39,738,755,763.01/206,812.58
  6. Step 6: Final answer
    x = 192,148.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.