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Finding the Fourth Proportional to 156,107.66, 215,427.74 and 84,487.59

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Solution

The fourth proportional to 156,107.66, 215,427.74 and 84,487.59 is: 116,592.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,107.66 : 215,427.74 = 84,487.59 : x
  2. Step 2: Convert to fraction form
    156,107.66/215,427.74 = 84,487.59/x
  3. Step 3: Cross multiply
    156,107.66x = 215,427.74 × 84,487.59
  4. Step 4: Simplify right side
    156,107.66x = 18,200,970,149.31
  5. Step 5: Solve for x
    x = 18,200,970,149.31/156,107.66
  6. Step 6: Final answer
    x = 116,592.43

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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.