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Finding the Fourth Proportional to 118,884.60, 178,228.62 and 92,705.40

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Solution

The fourth proportional to 118,884.60, 178,228.62 and 92,705.40 is: 138,981.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,884.60 : 178,228.62 = 92,705.40 : x
  2. Step 2: Convert to fraction form
    118,884.60/178,228.62 = 92,705.40/x
  3. Step 3: Cross multiply
    118,884.60x = 178,228.62 × 92,705.40
  4. Step 4: Simplify right side
    118,884.60x = 16,522,755,508.55
  5. Step 5: Solve for x
    x = 16,522,755,508.55/118,884.60
  6. Step 6: Final answer
    x = 138,981.46

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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.