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Finding the Fourth Proportional to 48,609.12, 72,913.68 and 13,549.08

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Solution

The fourth proportional to 48,609.12, 72,913.68 and 13,549.08 is: 20,323.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,609.12 : 72,913.68 = 13,549.08 : x
  2. Step 2: Convert to fraction form
    48,609.12/72,913.68 = 13,549.08/x
  3. Step 3: Cross multiply
    48,609.12x = 72,913.68 × 13,549.08
  4. Step 4: Simplify right side
    48,609.12x = 987,913,283.41
  5. Step 5: Solve for x
    x = 987,913,283.41/48,609.12
  6. Step 6: Final answer
    x = 20,323.62

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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.