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Finding the Fourth Proportional to 66,206.68, 91,394.67 and 39,357.88

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Solution

The fourth proportional to 66,206.68, 91,394.67 and 39,357.88 is: 54,331.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,206.68 : 91,394.67 = 39,357.88 : x
  2. Step 2: Convert to fraction form
    66,206.68/91,394.67 = 39,357.88/x
  3. Step 3: Cross multiply
    66,206.68x = 91,394.67 × 39,357.88
  4. Step 4: Simplify right side
    66,206.68x = 3,597,100,454.50
  5. Step 5: Solve for x
    x = 3,597,100,454.50/66,206.68
  6. Step 6: Final answer
    x = 54,331.38

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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.