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Finding the Fourth Proportional to 67,299.50, 92,787.05 and 55,155.28

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Solution

The fourth proportional to 67,299.50, 92,787.05 and 55,155.28 is: 76,043.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,299.50 : 92,787.05 = 55,155.28 : x
  2. Step 2: Convert to fraction form
    67,299.50/92,787.05 = 55,155.28/x
  3. Step 3: Cross multiply
    67,299.50x = 92,787.05 × 55,155.28
  4. Step 4: Simplify right side
    67,299.50x = 5,117,695,259.19
  5. Step 5: Solve for x
    x = 5,117,695,259.19/67,299.50
  6. Step 6: Final answer
    x = 76,043.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.