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Finding the Fourth Proportional to 72,690.70, 108,906.45 and 62,322.70

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Solution

The fourth proportional to 72,690.70, 108,906.45 and 62,322.70 is: 93,372.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,690.70 : 108,906.45 = 62,322.70 : x
  2. Step 2: Convert to fraction form
    72,690.70/108,906.45 = 62,322.70/x
  3. Step 3: Cross multiply
    72,690.70x = 108,906.45 × 62,322.70
  4. Step 4: Simplify right side
    72,690.70x = 6,787,344,011.42
  5. Step 5: Solve for x
    x = 6,787,344,011.42/72,690.70
  6. Step 6: Final answer
    x = 93,372.94

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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.