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Finding the Fourth Proportional to 156,866.08, 216,475 and 85,245.94

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Solution

The fourth proportional to 156,866.08, 216,475 and 85,245.94 is: 117,639.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,866.08 : 216,475 = 85,245.94 : x
  2. Step 2: Convert to fraction form
    156,866.08/216,475 = 85,245.94/x
  3. Step 3: Cross multiply
    156,866.08x = 216,475 × 85,245.94
  4. Step 4: Simplify right side
    156,866.08x = 18,453,614,861.50
  5. Step 5: Solve for x
    x = 18,453,614,861.50/156,866.08
  6. Step 6: Final answer
    x = 117,639.29

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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.