Home / 72,921.18-109,387.94-20,330.71

Finding the Fourth Proportional to 72,921.18, 109,387.94 and 20,330.71

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Solution

The fourth proportional to 72,921.18, 109,387.94 and 20,330.71 is: 30,497.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,921.18 : 109,387.94 = 20,330.71 : x
  2. Step 2: Convert to fraction form
    72,921.18/109,387.94 = 20,330.71/x
  3. Step 3: Cross multiply
    72,921.18x = 109,387.94 × 20,330.71
  4. Step 4: Simplify right side
    72,921.18x = 2,223,934,485.64
  5. Step 5: Solve for x
    x = 2,223,934,485.64/72,921.18
  6. Step 6: Final answer
    x = 30,497.79

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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.