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Finding the Fourth Proportional to 66,618.72, 91,933.92 and 36,810.72

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Solution

The fourth proportional to 66,618.72, 91,933.92 and 36,810.72 is: 50,798.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,618.72 : 91,933.92 = 36,810.72 : x
  2. Step 2: Convert to fraction form
    66,618.72/91,933.92 = 36,810.72/x
  3. Step 3: Cross multiply
    66,618.72x = 91,933.92 × 36,810.72
  4. Step 4: Simplify right side
    66,618.72x = 3,384,153,787.62
  5. Step 5: Solve for x
    x = 3,384,153,787.62/66,618.72
  6. Step 6: Final answer
    x = 50,798.84

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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.