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Finding the Fourth Proportional to 156,912.98, 216,540.68 and 85,293

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Solution

The fourth proportional to 156,912.98, 216,540.68 and 85,293 is: 117,704.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,912.98 : 216,540.68 = 85,293 : x
  2. Step 2: Convert to fraction form
    156,912.98/216,540.68 = 85,293/x
  3. Step 3: Cross multiply
    156,912.98x = 216,540.68 × 85,293
  4. Step 4: Simplify right side
    156,912.98x = 18,469,404,152.60
  5. Step 5: Solve for x
    x = 18,469,404,152.60/156,912.98
  6. Step 6: Final answer
    x = 117,704.76

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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.