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Finding the Fourth Proportional to 199,340.10, 299,010.15 and 128,837.70

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Solution

The fourth proportional to 199,340.10, 299,010.15 and 128,837.70 is: 193,256.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,340.10 : 299,010.15 = 128,837.70 : x
  2. Step 2: Convert to fraction form
    199,340.10/299,010.15 = 128,837.70/x
  3. Step 3: Cross multiply
    199,340.10x = 299,010.15 × 128,837.70
  4. Step 4: Simplify right side
    199,340.10x = 38,523,780,002.66
  5. Step 5: Solve for x
    x = 38,523,780,002.66/199,340.10
  6. Step 6: Final answer
    x = 193,256.55

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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.