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Finding the Fourth Proportional to 66,685.28, 91,640.80 and 63,601.52

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Solution

The fourth proportional to 66,685.28, 91,640.80 and 63,601.52 is: 87,403.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,685.28 : 91,640.80 = 63,601.52 : x
  2. Step 2: Convert to fraction form
    66,685.28/91,640.80 = 63,601.52/x
  3. Step 3: Cross multiply
    66,685.28x = 91,640.80 × 63,601.52
  4. Step 4: Simplify right side
    66,685.28x = 5,828,494,174.02
  5. Step 5: Solve for x
    x = 5,828,494,174.02/66,685.28
  6. Step 6: Final answer
    x = 87,403.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.