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Finding the Fourth Proportional to 66,652.28, 91,980.20 and 38,357.96

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Solution

The fourth proportional to 66,652.28, 91,980.20 and 38,357.96 is: 52,934.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,652.28 : 91,980.20 = 38,357.96 : x
  2. Step 2: Convert to fraction form
    66,652.28/91,980.20 = 38,357.96/x
  3. Step 3: Cross multiply
    66,652.28x = 91,980.20 × 38,357.96
  4. Step 4: Simplify right side
    66,652.28x = 3,528,172,832.39
  5. Step 5: Solve for x
    x = 3,528,172,832.39/66,652.28
  6. Step 6: Final answer
    x = 52,934.02

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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.