Home / 72,721.56-109,029.96-28,310.88

Finding the Fourth Proportional to 72,721.56, 109,029.96 and 28,310.88

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Solution

The fourth proportional to 72,721.56, 109,029.96 and 28,310.88 is: 42,445.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,721.56 : 109,029.96 = 28,310.88 : x
  2. Step 2: Convert to fraction form
    72,721.56/109,029.96 = 28,310.88/x
  3. Step 3: Cross multiply
    72,721.56x = 109,029.96 × 28,310.88
  4. Step 4: Simplify right side
    72,721.56x = 3,086,734,113.96
  5. Step 5: Solve for x
    x = 3,086,734,113.96/72,721.56
  6. Step 6: Final answer
    x = 42,445.93

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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.