Home / 203,813.31-305,559.19-128,775.32

Finding the Fourth Proportional to 203,813.31, 305,559.19 and 128,775.32

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Solution

The fourth proportional to 203,813.31, 305,559.19 and 128,775.32 is: 193,061.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,813.31 : 305,559.19 = 128,775.32 : x
  2. Step 2: Convert to fraction form
    203,813.31/305,559.19 = 128,775.32/x
  3. Step 3: Cross multiply
    203,813.31x = 305,559.19 × 128,775.32
  4. Step 4: Simplify right side
    203,813.31x = 39,348,481,525.85
  5. Step 5: Solve for x
    x = 39,348,481,525.85/203,813.31
  6. Step 6: Final answer
    x = 193,061.39

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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.