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Finding the Fourth Proportional to 118,651.60, 178,078.20 and 48,581.20

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Solution

The fourth proportional to 118,651.60, 178,078.20 and 48,581.20 is: 72,913.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,651.60 : 178,078.20 = 48,581.20 : x
  2. Step 2: Convert to fraction form
    118,651.60/178,078.20 = 48,581.20/x
  3. Step 3: Cross multiply
    118,651.60x = 178,078.20 × 48,581.20
  4. Step 4: Simplify right side
    118,651.60x = 8,651,252,649.84
  5. Step 5: Solve for x
    x = 8,651,252,649.84/118,651.60
  6. Step 6: Final answer
    x = 72,913.07

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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.