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Finding the Fourth Proportional to 66,408.04, 91,640.41 and 36,192.71

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Solution

The fourth proportional to 66,408.04, 91,640.41 and 36,192.71 is: 49,944.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,408.04 : 91,640.41 = 36,192.71 : x
  2. Step 2: Convert to fraction form
    66,408.04/91,640.41 = 36,192.71/x
  3. Step 3: Cross multiply
    66,408.04x = 91,640.41 × 36,192.71
  4. Step 4: Simplify right side
    66,408.04x = 3,316,714,783.41
  5. Step 5: Solve for x
    x = 3,316,714,783.41/66,408.04
  6. Step 6: Final answer
    x = 49,944.48

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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.