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Finding the Fourth Proportional to 203,985.60, 306,043.20 and 91,622.40

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Solution

The fourth proportional to 203,985.60, 306,043.20 and 91,622.40 is: 137,462.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,985.60 : 306,043.20 = 91,622.40 : x
  2. Step 2: Convert to fraction form
    203,985.60/306,043.20 = 91,622.40/x
  3. Step 3: Cross multiply
    203,985.60x = 306,043.20 × 91,622.40
  4. Step 4: Simplify right side
    203,985.60x = 28,040,412,487.68
  5. Step 5: Solve for x
    x = 28,040,412,487.68/203,985.60
  6. Step 6: Final answer
    x = 137,462.71

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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.