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Finding the Fourth Proportional to 156,781.67, 216,359.12 and 85,161.11

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Solution

The fourth proportional to 156,781.67, 216,359.12 and 85,161.11 is: 117,522.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,781.67 : 216,359.12 = 85,161.11 : x
  2. Step 2: Convert to fraction form
    156,781.67/216,359.12 = 85,161.11/x
  3. Step 3: Cross multiply
    156,781.67x = 216,359.12 × 85,161.11
  4. Step 4: Simplify right side
    156,781.67x = 18,425,382,817.82
  5. Step 5: Solve for x
    x = 18,425,382,817.82/156,781.67
  6. Step 6: Final answer
    x = 117,522.56

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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.