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Finding the Fourth Proportional to 156,960.76, 216,605.56 and 85,340.61

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Solution

The fourth proportional to 156,960.76, 216,605.56 and 85,340.61 is: 117,769.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,960.76 : 216,605.56 = 85,340.61 : x
  2. Step 2: Convert to fraction form
    156,960.76/216,605.56 = 85,340.61/x
  3. Step 3: Cross multiply
    156,960.76x = 216,605.56 × 85,340.61
  4. Step 4: Simplify right side
    156,960.76x = 18,485,250,815.63
  5. Step 5: Solve for x
    x = 18,485,250,815.63/156,960.76
  6. Step 6: Final answer
    x = 117,769.88

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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.