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Finding the Fourth Proportional to 92,660.68, 139,183.58 and 74,911.40

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Solution

The fourth proportional to 92,660.68, 139,183.58 and 74,911.40 is: 112,522.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,660.68 : 139,183.58 = 74,911.40 : x
  2. Step 2: Convert to fraction form
    92,660.68/139,183.58 = 74,911.40/x
  3. Step 3: Cross multiply
    92,660.68x = 139,183.58 × 74,911.40
  4. Step 4: Simplify right side
    92,660.68x = 10,426,436,834.81
  5. Step 5: Solve for x
    x = 10,426,436,834.81/92,660.68
  6. Step 6: Final answer
    x = 112,522.77

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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.