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Finding the Fourth Proportional to 156,609.69, 216,121.52 and 84,989.73

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Solution

The fourth proportional to 156,609.69, 216,121.52 and 84,989.73 is: 117,285.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,609.69 : 216,121.52 = 84,989.73 : x
  2. Step 2: Convert to fraction form
    156,609.69/216,121.52 = 84,989.73/x
  3. Step 3: Cross multiply
    156,609.69x = 216,121.52 × 84,989.73
  4. Step 4: Simplify right side
    156,609.69x = 18,368,108,551.38
  5. Step 5: Solve for x
    x = 18,368,108,551.38/156,609.69
  6. Step 6: Final answer
    x = 117,285.90

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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.