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Finding the Fourth Proportional to 66,496.66, 91,777.26 and 39,640.90

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Solution

The fourth proportional to 66,496.66, 91,777.26 and 39,640.90 is: 54,711.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,496.66 : 91,777.26 = 39,640.90 : x
  2. Step 2: Convert to fraction form
    66,496.66/91,777.26 = 39,640.90/x
  3. Step 3: Cross multiply
    66,496.66x = 91,777.26 × 39,640.90
  4. Step 4: Simplify right side
    66,496.66x = 3,638,133,185.93
  5. Step 5: Solve for x
    x = 3,638,133,185.93/66,496.66
  6. Step 6: Final answer
    x = 54,711.52

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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.