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Finding the Fourth Proportional to 156,645.90, 216,171.51 and 85,025.90

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Solution

The fourth proportional to 156,645.90, 216,171.51 and 85,025.90 is: 117,335.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,645.90 : 216,171.51 = 85,025.90 : x
  2. Step 2: Convert to fraction form
    156,645.90/216,171.51 = 85,025.90/x
  3. Step 3: Cross multiply
    156,645.90x = 216,171.51 × 85,025.90
  4. Step 4: Simplify right side
    156,645.90x = 18,380,176,766.98
  5. Step 5: Solve for x
    x = 18,380,176,766.98/156,645.90
  6. Step 6: Final answer
    x = 117,335.83

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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.