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Finding the Fourth Proportional to 74,228.60, 111,342.90 and 48,859.40

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Solution

The fourth proportional to 74,228.60, 111,342.90 and 48,859.40 is: 73,289.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,228.60 : 111,342.90 = 48,859.40 : x
  2. Step 2: Convert to fraction form
    74,228.60/111,342.90 = 48,859.40/x
  3. Step 3: Cross multiply
    74,228.60x = 111,342.90 × 48,859.40
  4. Step 4: Simplify right side
    74,228.60x = 5,440,147,288.26
  5. Step 5: Solve for x
    x = 5,440,147,288.26/74,228.60
  6. Step 6: Final answer
    x = 73,289.10

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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.