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Finding the Fourth Proportional to 66,869.80, 100,348.20 and 28,956.11

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Solution

The fourth proportional to 66,869.80, 100,348.20 and 28,956.11 is: 43,453.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,869.80 : 100,348.20 = 28,956.11 : x
  2. Step 2: Convert to fraction form
    66,869.80/100,348.20 = 28,956.11/x
  3. Step 3: Cross multiply
    66,869.80x = 100,348.20 × 28,956.11
  4. Step 4: Simplify right side
    66,869.80x = 2,905,693,015.76
  5. Step 5: Solve for x
    x = 2,905,693,015.76/66,869.80
  6. Step 6: Final answer
    x = 43,453.00

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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.