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Finding the Fourth Proportional to 203,779.80, 305,900.10 and 120,720.60

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Solution

The fourth proportional to 203,779.80, 305,900.10 and 120,720.60 is: 181,217.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,779.80 : 305,900.10 = 120,720.60 : x
  2. Step 2: Convert to fraction form
    203,779.80/305,900.10 = 120,720.60/x
  3. Step 3: Cross multiply
    203,779.80x = 305,900.10 × 120,720.60
  4. Step 4: Simplify right side
    203,779.80x = 36,928,443,612.06
  5. Step 5: Solve for x
    x = 36,928,443,612.06/203,779.80
  6. Step 6: Final answer
    x = 181,217.39

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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.