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Finding the Fourth Proportional to 66,813.78, 92,214.89 and 39,959.24

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Solution

The fourth proportional to 66,813.78, 92,214.89 and 39,959.24 is: 55,150.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,813.78 : 92,214.89 = 39,959.24 : x
  2. Step 2: Convert to fraction form
    66,813.78/92,214.89 = 39,959.24/x
  3. Step 3: Cross multiply
    66,813.78x = 92,214.89 × 39,959.24
  4. Step 4: Simplify right side
    66,813.78x = 3,684,836,260.21
  5. Step 5: Solve for x
    x = 3,684,836,260.21/66,813.78
  6. Step 6: Final answer
    x = 55,150.84

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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.