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Finding the Fourth Proportional to 156,648.60, 216,176.16 and 85,028.61

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Solution

The fourth proportional to 156,648.60, 216,176.16 and 85,028.61 is: 117,340.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,648.60 : 216,176.16 = 85,028.61 : x
  2. Step 2: Convert to fraction form
    156,648.60/216,176.16 = 85,028.61/x
  3. Step 3: Cross multiply
    156,648.60x = 216,176.16 × 85,028.61
  4. Step 4: Simplify right side
    156,648.60x = 18,381,158,399.94
  5. Step 5: Solve for x
    x = 18,381,158,399.94/156,648.60
  6. Step 6: Final answer
    x = 117,340.07

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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.