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Finding the Fourth Proportional to 156,993.60, 217,221.68 and 136,892.40

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Solution

The fourth proportional to 156,993.60, 217,221.68 and 136,892.40 is: 189,408.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,993.60 : 217,221.68 = 136,892.40 : x
  2. Step 2: Convert to fraction form
    156,993.60/217,221.68 = 136,892.40/x
  3. Step 3: Cross multiply
    156,993.60x = 217,221.68 × 136,892.40
  4. Step 4: Simplify right side
    156,993.60x = 29,735,997,107.23
  5. Step 5: Solve for x
    x = 29,735,997,107.23/156,993.60
  6. Step 6: Final answer
    x = 189,408.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.