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Finding the Fourth Proportional to 92,731.85, 139,121.16 and 42,847.22

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Solution

The fourth proportional to 92,731.85, 139,121.16 and 42,847.22 is: 64,281.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,731.85 : 139,121.16 = 42,847.22 : x
  2. Step 2: Convert to fraction form
    92,731.85/139,121.16 = 42,847.22/x
  3. Step 3: Cross multiply
    92,731.85x = 139,121.16 × 42,847.22
  4. Step 4: Simplify right side
    92,731.85x = 5,960,954,253.57
  5. Step 5: Solve for x
    x = 5,960,954,253.57/92,731.85
  6. Step 6: Final answer
    x = 64,281.63

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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.