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Finding the Fourth Proportional to 128,816.10, 193,224.15 and 54,020.70

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Solution

The fourth proportional to 128,816.10, 193,224.15 and 54,020.70 is: 81,031.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,816.10 : 193,224.15 = 54,020.70 : x
  2. Step 2: Convert to fraction form
    128,816.10/193,224.15 = 54,020.70/x
  3. Step 3: Cross multiply
    128,816.10x = 193,224.15 × 54,020.70
  4. Step 4: Simplify right side
    128,816.10x = 10,438,103,839.91
  5. Step 5: Solve for x
    x = 10,438,103,839.91/128,816.10
  6. Step 6: Final answer
    x = 81,031.05

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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.