Home / 156,942.70-216,559.71-100,313.90

Finding the Fourth Proportional to 156,942.70, 216,559.71 and 100,313.90

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Solution

The fourth proportional to 156,942.70, 216,559.71 and 100,313.90 is: 138,419.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,942.70 : 216,559.71 = 100,313.90 : x
  2. Step 2: Convert to fraction form
    156,942.70/216,559.71 = 100,313.90/x
  3. Step 3: Cross multiply
    156,942.70x = 216,559.71 × 100,313.90
  4. Step 4: Simplify right side
    156,942.70x = 21,723,949,092.97
  5. Step 5: Solve for x
    x = 21,723,949,092.97/156,942.70
  6. Step 6: Final answer
    x = 138,419.62

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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.