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Finding the Fourth Proportional to 74,657.60, 111,856.80 and 48,348.80

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Solution

The fourth proportional to 74,657.60, 111,856.80 and 48,348.80 is: 72,439.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,657.60 : 111,856.80 = 48,348.80 : x
  2. Step 2: Convert to fraction form
    74,657.60/111,856.80 = 48,348.80/x
  3. Step 3: Cross multiply
    74,657.60x = 111,856.80 × 48,348.80
  4. Step 4: Simplify right side
    74,657.60x = 5,408,142,051.84
  5. Step 5: Solve for x
    x = 5,408,142,051.84/74,657.60
  6. Step 6: Final answer
    x = 72,439.27

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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.