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Finding the Fourth Proportional to 199,685.70, 299,657.34 and 128,600.91

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Solution

The fourth proportional to 199,685.70, 299,657.34 and 128,600.91 is: 192,984.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,685.70 : 299,657.34 = 128,600.91 : x
  2. Step 2: Convert to fraction form
    199,685.70/299,657.34 = 128,600.91/x
  3. Step 3: Cross multiply
    199,685.70x = 299,657.34 × 128,600.91
  4. Step 4: Simplify right side
    199,685.70x = 38,536,206,612.18
  5. Step 5: Solve for x
    x = 38,536,206,612.18/199,685.70
  6. Step 6: Final answer
    x = 192,984.31

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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.