Home / 156,972.78-216,621.37-85,352.86

Finding the Fourth Proportional to 156,972.78, 216,621.37 and 85,352.86

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Solution

The fourth proportional to 156,972.78, 216,621.37 and 85,352.86 is: 117,786.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,972.78 : 216,621.37 = 85,352.86 : x
  2. Step 2: Convert to fraction form
    156,972.78/216,621.37 = 85,352.86/x
  3. Step 3: Cross multiply
    156,972.78x = 216,621.37 × 85,352.86
  4. Step 4: Simplify right side
    156,972.78x = 18,489,253,466.62
  5. Step 5: Solve for x
    x = 18,489,253,466.62/156,972.78
  6. Step 6: Final answer
    x = 117,786.37

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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.