Home / 198,517.52-297,739.56-90,421.40

Finding the Fourth Proportional to 198,517.52, 297,739.56 and 90,421.40

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Solution

The fourth proportional to 198,517.52, 297,739.56 and 90,421.40 is: 135,615.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,517.52 : 297,739.56 = 90,421.40 : x
  2. Step 2: Convert to fraction form
    198,517.52/297,739.56 = 90,421.40/x
  3. Step 3: Cross multiply
    198,517.52x = 297,739.56 × 90,421.40
  4. Step 4: Simplify right side
    198,517.52x = 26,922,027,850.58
  5. Step 5: Solve for x
    x = 26,922,027,850.58/198,517.52
  6. Step 6: Final answer
    x = 135,615.37

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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.