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Finding the Fourth Proportional to 156,648.39, 216,168.99 and 85,026.90

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Solution

The fourth proportional to 156,648.39, 216,168.99 and 85,026.90 is: 117,333.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,648.39 : 216,168.99 = 85,026.90 : x
  2. Step 2: Convert to fraction form
    156,648.39/216,168.99 = 85,026.90/x
  3. Step 3: Cross multiply
    156,648.39x = 216,168.99 × 85,026.90
  4. Step 4: Simplify right side
    156,648.39x = 18,380,179,095.83
  5. Step 5: Solve for x
    x = 18,380,179,095.83/156,648.39
  6. Step 6: Final answer
    x = 117,333.98

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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.