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Finding the Fourth Proportional to 66,219.76, 91,383.78 and 36,005.68

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Solution

The fourth proportional to 66,219.76, 91,383.78 and 36,005.68 is: 49,688.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,219.76 : 91,383.78 = 36,005.68 : x
  2. Step 2: Convert to fraction form
    66,219.76/91,383.78 = 36,005.68/x
  3. Step 3: Cross multiply
    66,219.76x = 91,383.78 × 36,005.68
  4. Step 4: Simplify right side
    66,219.76x = 3,290,335,139.87
  5. Step 5: Solve for x
    x = 3,290,335,139.87/66,219.76
  6. Step 6: Final answer
    x = 49,688.12

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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.