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Finding the Fourth Proportional to 92,909.64, 139,363.74 and 30,579.96

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Solution

The fourth proportional to 92,909.64, 139,363.74 and 30,579.96 is: 45,869.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,909.64 : 139,363.74 = 30,579.96 : x
  2. Step 2: Convert to fraction form
    92,909.64/139,363.74 = 30,579.96/x
  3. Step 3: Cross multiply
    92,909.64x = 139,363.74 × 30,579.96
  4. Step 4: Simplify right side
    92,909.64x = 4,261,737,594.65
  5. Step 5: Solve for x
    x = 4,261,737,594.65/92,909.64
  6. Step 6: Final answer
    x = 45,869.70

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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.