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Finding the Fourth Proportional to 66,363.66, 91,581.98 and 39,507.10

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Solution

The fourth proportional to 66,363.66, 91,581.98 and 39,507.10 is: 54,519.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,363.66 : 91,581.98 = 39,507.10 : x
  2. Step 2: Convert to fraction form
    66,363.66/91,581.98 = 39,507.10/x
  3. Step 3: Cross multiply
    66,363.66x = 91,581.98 × 39,507.10
  4. Step 4: Simplify right side
    66,363.66x = 3,618,138,015.57
  5. Step 5: Solve for x
    x = 3,618,138,015.57/66,363.66
  6. Step 6: Final answer
    x = 54,519.87

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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.