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Finding the Fourth Proportional to 156,648.85, 216,176.51 and 85,028.86

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Solution

The fourth proportional to 156,648.85, 216,176.51 and 85,028.86 is: 117,340.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,648.85 : 216,176.51 = 85,028.86 : x
  2. Step 2: Convert to fraction form
    156,648.85/216,176.51 = 85,028.86/x
  3. Step 3: Cross multiply
    156,648.85x = 216,176.51 × 85,028.86
  4. Step 4: Simplify right side
    156,648.85x = 18,381,242,204.08
  5. Step 5: Solve for x
    x = 18,381,242,204.08/156,648.85
  6. Step 6: Final answer
    x = 117,340.42

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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.