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Finding the Fourth Proportional to 156,609.81, 216,121.68 and 84,989.83

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Solution

The fourth proportional to 156,609.81, 216,121.68 and 84,989.83 is: 117,286.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,609.81 : 216,121.68 = 84,989.83 : x
  2. Step 2: Convert to fraction form
    156,609.81/216,121.68 = 84,989.83/x
  3. Step 3: Cross multiply
    156,609.81x = 216,121.68 × 84,989.83
  4. Step 4: Simplify right side
    156,609.81x = 18,368,144,417.57
  5. Step 5: Solve for x
    x = 18,368,144,417.57/156,609.81
  6. Step 6: Final answer
    x = 117,286.04

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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.