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Finding the Fourth Proportional to 215,903.20, 323,617.20 and 75,589.60

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Solution

The fourth proportional to 215,903.20, 323,617.20 and 75,589.60 is: 113,301.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,903.20 : 323,617.20 = 75,589.60 : x
  2. Step 2: Convert to fraction form
    215,903.20/323,617.20 = 75,589.60/x
  3. Step 3: Cross multiply
    215,903.20x = 323,617.20 × 75,589.60
  4. Step 4: Simplify right side
    215,903.20x = 24,462,094,701.12
  5. Step 5: Solve for x
    x = 24,462,094,701.12/215,903.20
  6. Step 6: Final answer
    x = 113,301.21

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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.