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Finding the Fourth Proportional to 156,963.40, 216,609.96 and 85,343.70

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Solution

The fourth proportional to 156,963.40, 216,609.96 and 85,343.70 is: 117,774.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,963.40 : 216,609.96 = 85,343.70 : x
  2. Step 2: Convert to fraction form
    156,963.40/216,609.96 = 85,343.70/x
  3. Step 3: Cross multiply
    156,963.40x = 216,609.96 × 85,343.70
  4. Step 4: Simplify right side
    156,963.40x = 18,486,295,443.25
  5. Step 5: Solve for x
    x = 18,486,295,443.25/156,963.40
  6. Step 6: Final answer
    x = 117,774.56

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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.