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Finding the Fourth Proportional to 156,649.77, 216,176.85 and 85,029.78

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Solution

The fourth proportional to 156,649.77, 216,176.85 and 85,029.78 is: 117,341.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,649.77 : 216,176.85 = 85,029.78 : x
  2. Step 2: Convert to fraction form
    156,649.77/216,176.85 = 85,029.78/x
  3. Step 3: Cross multiply
    156,649.77x = 216,176.85 × 85,029.78
  4. Step 4: Simplify right side
    156,649.77x = 18,381,469,996.59
  5. Step 5: Solve for x
    x = 18,381,469,996.59/156,649.77
  6. Step 6: Final answer
    x = 117,341.19

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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.