Home / 198,515.20-297,686.58-72,113.44

Finding the Fourth Proportional to 198,515.20, 297,686.58 and 72,113.44

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Solution

The fourth proportional to 198,515.20, 297,686.58 and 72,113.44 is: 108,138.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,515.20 : 297,686.58 = 72,113.44 : x
  2. Step 2: Convert to fraction form
    198,515.20/297,686.58 = 72,113.44/x
  3. Step 3: Cross multiply
    198,515.20x = 297,686.58 × 72,113.44
  4. Step 4: Simplify right side
    198,515.20x = 21,467,203,325.64
  5. Step 5: Solve for x
    x = 21,467,203,325.64/198,515.20
  6. Step 6: Final answer
    x = 108,138.84

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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.