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Finding the Fourth Proportional to 66,406.74, 91,640.16 and 36,192.32

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Solution

The fourth proportional to 66,406.74, 91,640.16 and 36,192.32 is: 49,944.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,406.74 : 91,640.16 = 36,192.32 : x
  2. Step 2: Convert to fraction form
    66,406.74/91,640.16 = 36,192.32/x
  3. Step 3: Cross multiply
    66,406.74x = 91,640.16 × 36,192.32
  4. Step 4: Simplify right side
    66,406.74x = 3,316,669,881.02
  5. Step 5: Solve for x
    x = 3,316,669,881.02/66,406.74
  6. Step 6: Final answer
    x = 49,944.78

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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.