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Finding the Fourth Proportional to 66,219.86, 91,383.78 and 36,005.48

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Solution

The fourth proportional to 66,219.86, 91,383.78 and 36,005.48 is: 49,687.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,219.86 : 91,383.78 = 36,005.48 : x
  2. Step 2: Convert to fraction form
    66,219.86/91,383.78 = 36,005.48/x
  3. Step 3: Cross multiply
    66,219.86x = 91,383.78 × 36,005.48
  4. Step 4: Simplify right side
    66,219.86x = 3,290,316,863.11
  5. Step 5: Solve for x
    x = 3,290,316,863.11/66,219.86
  6. Step 6: Final answer
    x = 49,687.77

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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.