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Finding the Fourth Proportional to 75,617.70, 113,417.90 and 20,218.02

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Solution

The fourth proportional to 75,617.70, 113,417.90 and 20,218.02 is: 30,324.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,617.70 : 113,417.90 = 20,218.02 : x
  2. Step 2: Convert to fraction form
    75,617.70/113,417.90 = 20,218.02/x
  3. Step 3: Cross multiply
    75,617.70x = 113,417.90 × 20,218.02
  4. Step 4: Simplify right side
    75,617.70x = 2,293,085,370.56
  5. Step 5: Solve for x
    x = 2,293,085,370.56/75,617.70
  6. Step 6: Final answer
    x = 30,324.72

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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.