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Finding the Fourth Proportional to 74,447.80, 111,477.30 and 48,009.40

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Solution

The fourth proportional to 74,447.80, 111,477.30 and 48,009.40 is: 71,888.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,447.80 : 111,477.30 = 48,009.40 : x
  2. Step 2: Convert to fraction form
    74,447.80/111,477.30 = 48,009.40/x
  3. Step 3: Cross multiply
    74,447.80x = 111,477.30 × 48,009.40
  4. Step 4: Simplify right side
    74,447.80x = 5,351,958,286.62
  5. Step 5: Solve for x
    x = 5,351,958,286.62/74,447.80
  6. Step 6: Final answer
    x = 71,888.74

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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.