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Finding the Fourth Proportional to 48,609.70, 72,905.55 and 13,542.10

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Solution

The fourth proportional to 48,609.70, 72,905.55 and 13,542.10 is: 20,310.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,609.70 : 72,905.55 = 13,542.10 : x
  2. Step 2: Convert to fraction form
    48,609.70/72,905.55 = 13,542.10/x
  3. Step 3: Cross multiply
    48,609.70x = 72,905.55 × 13,542.10
  4. Step 4: Simplify right side
    48,609.70x = 987,294,248.66
  5. Step 5: Solve for x
    x = 987,294,248.66/48,609.70
  6. Step 6: Final answer
    x = 20,310.64

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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.