Home / 72,621.72-108,932.40-30,490.56

Finding the Fourth Proportional to 72,621.72, 108,932.40 and 30,490.56

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Solution

The fourth proportional to 72,621.72, 108,932.40 and 30,490.56 is: 45,735.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,621.72 : 108,932.40 = 30,490.56 : x
  2. Step 2: Convert to fraction form
    72,621.72/108,932.40 = 30,490.56/x
  3. Step 3: Cross multiply
    72,621.72x = 108,932.40 × 30,490.56
  4. Step 4: Simplify right side
    72,621.72x = 3,321,409,878.14
  5. Step 5: Solve for x
    x = 3,321,409,878.14/72,621.72
  6. Step 6: Final answer
    x = 45,735.76

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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.