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Finding the Fourth Proportional to 73,241.28, 109,920.28 and 28,879.20

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Solution

The fourth proportional to 73,241.28, 109,920.28 and 28,879.20 is: 43,341.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,241.28 : 109,920.28 = 28,879.20 : x
  2. Step 2: Convert to fraction form
    73,241.28/109,920.28 = 28,879.20/x
  3. Step 3: Cross multiply
    73,241.28x = 109,920.28 × 28,879.20
  4. Step 4: Simplify right side
    73,241.28x = 3,174,409,750.18
  5. Step 5: Solve for x
    x = 3,174,409,750.18/73,241.28
  6. Step 6: Final answer
    x = 43,341.81

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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.