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Finding the Fourth Proportional to 48,692.40, 73,045.92 and 20,612.40

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Solution

The fourth proportional to 48,692.40, 73,045.92 and 20,612.40 is: 30,921.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,692.40 : 73,045.92 = 20,612.40 : x
  2. Step 2: Convert to fraction form
    48,692.40/73,045.92 = 20,612.40/x
  3. Step 3: Cross multiply
    48,692.40x = 73,045.92 × 20,612.40
  4. Step 4: Simplify right side
    48,692.40x = 1,505,651,721.41
  5. Step 5: Solve for x
    x = 1,505,651,721.41/48,692.40
  6. Step 6: Final answer
    x = 30,921.70

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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.