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Finding the Fourth Proportional to 65,863.53, 90,893.88 and 40,364.97

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Solution

The fourth proportional to 65,863.53, 90,893.88 and 40,364.97 is: 55,705.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,863.53 : 90,893.88 = 40,364.97 : x
  2. Step 2: Convert to fraction form
    65,863.53/90,893.88 = 40,364.97/x
  3. Step 3: Cross multiply
    65,863.53x = 90,893.88 × 40,364.97
  4. Step 4: Simplify right side
    65,863.53x = 3,668,928,739.38
  5. Step 5: Solve for x
    x = 3,668,928,739.38/65,863.53
  6. Step 6: Final answer
    x = 55,705.01

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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.