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Finding the Fourth Proportional to 65,805.96, 90,805.14 and 38,949.60

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Solution

The fourth proportional to 65,805.96, 90,805.14 and 38,949.60 is: 53,746.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,805.96 : 90,805.14 = 38,949.60 : x
  2. Step 2: Convert to fraction form
    65,805.96/90,805.14 = 38,949.60/x
  3. Step 3: Cross multiply
    65,805.96x = 90,805.14 × 38,949.60
  4. Step 4: Simplify right side
    65,805.96x = 3,536,823,880.94
  5. Step 5: Solve for x
    x = 3,536,823,880.94/65,805.96
  6. Step 6: Final answer
    x = 53,746.25

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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.