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Finding the Fourth Proportional to 65,586.20, 90,513.90 and 40,097.39

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Solution

The fourth proportional to 65,586.20, 90,513.90 and 40,097.39 is: 55,337.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,586.20 : 90,513.90 = 40,097.39 : x
  2. Step 2: Convert to fraction form
    65,586.20/90,513.90 = 40,097.39/x
  3. Step 3: Cross multiply
    65,586.20x = 90,513.90 × 40,097.39
  4. Step 4: Simplify right side
    65,586.20x = 3,629,370,696.15
  5. Step 5: Solve for x
    x = 3,629,370,696.15/65,586.20
  6. Step 6: Final answer
    x = 55,337.42

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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.