Home / 72,516.36-108,770.12-43,121.28

Finding the Fourth Proportional to 72,516.36, 108,770.12 and 43,121.28

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Solution

The fourth proportional to 72,516.36, 108,770.12 and 43,121.28 is: 64,679.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,516.36 : 108,770.12 = 43,121.28 : x
  2. Step 2: Convert to fraction form
    72,516.36/108,770.12 = 43,121.28/x
  3. Step 3: Cross multiply
    72,516.36x = 108,770.12 × 43,121.28
  4. Step 4: Simplify right side
    72,516.36x = 4,690,306,800.15
  5. Step 5: Solve for x
    x = 4,690,306,800.15/72,516.36
  6. Step 6: Final answer
    x = 64,679.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.