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Finding the Fourth Proportional to 65,847.87, 90,860.54 and 38,991.51

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Solution

The fourth proportional to 65,847.87, 90,860.54 and 38,991.51 is: 53,802.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,847.87 : 90,860.54 = 38,991.51 : x
  2. Step 2: Convert to fraction form
    65,847.87/90,860.54 = 38,991.51/x
  3. Step 3: Cross multiply
    65,847.87x = 90,860.54 × 38,991.51
  4. Step 4: Simplify right side
    65,847.87x = 3,542,789,459.06
  5. Step 5: Solve for x
    x = 3,542,789,459.06/65,847.87
  6. Step 6: Final answer
    x = 53,802.64

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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.