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Finding the Fourth Proportional to 203,765.20, 305,661.30 and 54,003.40

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Solution

The fourth proportional to 203,765.20, 305,661.30 and 54,003.40 is: 81,008.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,765.20 : 305,661.30 = 54,003.40 : x
  2. Step 2: Convert to fraction form
    203,765.20/305,661.30 = 54,003.40/x
  3. Step 3: Cross multiply
    203,765.20x = 305,661.30 × 54,003.40
  4. Step 4: Simplify right side
    203,765.20x = 16,506,749,448.42
  5. Step 5: Solve for x
    x = 16,506,749,448.42/203,765.20
  6. Step 6: Final answer
    x = 81,008.68

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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.