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Finding the Fourth Proportional to 156,654.81, 216,183.87 and 85,034.79

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Solution

The fourth proportional to 156,654.81, 216,183.87 and 85,034.79 is: 117,348.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,654.81 : 216,183.87 = 85,034.79 : x
  2. Step 2: Convert to fraction form
    156,654.81/216,183.87 = 85,034.79/x
  3. Step 3: Cross multiply
    156,654.81x = 216,183.87 × 85,034.79
  4. Step 4: Simplify right side
    156,654.81x = 18,383,149,986.84
  5. Step 5: Solve for x
    x = 18,383,149,986.84/156,654.81
  6. Step 6: Final answer
    x = 117,348.14

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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.