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Finding the Fourth Proportional to 156,689.45, 216,231.44 and 85,069.48

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Solution

The fourth proportional to 156,689.45, 216,231.44 and 85,069.48 is: 117,395.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,689.45 : 216,231.44 = 85,069.48 : x
  2. Step 2: Convert to fraction form
    156,689.45/216,231.44 = 85,069.48/x
  3. Step 3: Cross multiply
    156,689.45x = 216,231.44 × 85,069.48
  4. Step 4: Simplify right side
    156,689.45x = 18,394,696,160.45
  5. Step 5: Solve for x
    x = 18,394,696,160.45/156,689.45
  6. Step 6: Final answer
    x = 117,395.88

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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.