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Finding the Fourth Proportional to 156,992.11, 216,651.31 and 85,372.11

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Solution

The fourth proportional to 156,992.11, 216,651.31 and 85,372.11 is: 117,814.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,992.11 : 216,651.31 = 85,372.11 : x
  2. Step 2: Convert to fraction form
    156,992.11/216,651.31 = 85,372.11/x
  3. Step 3: Cross multiply
    156,992.11x = 216,651.31 × 85,372.11
  4. Step 4: Simplify right side
    156,992.11x = 18,495,979,255.53
  5. Step 5: Solve for x
    x = 18,495,979,255.53/156,992.11
  6. Step 6: Final answer
    x = 117,814.71

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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.