Home / 72,631.98-108,990-30,508.38

Finding the Fourth Proportional to 72,631.98, 108,990 and 30,508.38

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Solution

The fourth proportional to 72,631.98, 108,990 and 30,508.38 is: 45,780.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,631.98 : 108,990 = 30,508.38 : x
  2. Step 2: Convert to fraction form
    72,631.98/108,990 = 30,508.38/x
  3. Step 3: Cross multiply
    72,631.98x = 108,990 × 30,508.38
  4. Step 4: Simplify right side
    72,631.98x = 3,325,108,336.20
  5. Step 5: Solve for x
    x = 3,325,108,336.20/72,631.98
  6. Step 6: Final answer
    x = 45,780.22

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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.