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Finding the Fourth Proportional to 66,156.71, 99,250.45 and 21,783.86

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Solution

The fourth proportional to 66,156.71, 99,250.45 and 21,783.86 is: 32,680.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,156.71 : 99,250.45 = 21,783.86 : x
  2. Step 2: Convert to fraction form
    66,156.71/99,250.45 = 21,783.86/x
  3. Step 3: Cross multiply
    66,156.71x = 99,250.45 × 21,783.86
  4. Step 4: Simplify right side
    66,156.71x = 2,162,057,357.03
  5. Step 5: Solve for x
    x = 2,162,057,357.03/66,156.71
  6. Step 6: Final answer
    x = 32,680.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.