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Finding the Fourth Proportional to 186,921.20, 280,381.80 and 55,593.20

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Solution

The fourth proportional to 186,921.20, 280,381.80 and 55,593.20 is: 83,389.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,921.20 : 280,381.80 = 55,593.20 : x
  2. Step 2: Convert to fraction form
    186,921.20/280,381.80 = 55,593.20/x
  3. Step 3: Cross multiply
    186,921.20x = 280,381.80 × 55,593.20
  4. Step 4: Simplify right side
    186,921.20x = 15,587,320,081.85
  5. Step 5: Solve for x
    x = 15,587,320,081.85/186,921.20
  6. Step 6: Final answer
    x = 83,389.79

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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.