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Finding the Fourth Proportional to 66,511.24, 91,797.22 and 39,655.40

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Solution

The fourth proportional to 66,511.24, 91,797.22 and 39,655.40 is: 54,731.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,511.24 : 91,797.22 = 39,655.40 : x
  2. Step 2: Convert to fraction form
    66,511.24/91,797.22 = 39,655.40/x
  3. Step 3: Cross multiply
    66,511.24x = 91,797.22 × 39,655.40
  4. Step 4: Simplify right side
    66,511.24x = 3,640,255,477.99
  5. Step 5: Solve for x
    x = 3,640,255,477.99/66,511.24
  6. Step 6: Final answer
    x = 54,731.43

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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.