Home / 198,410.11-297,411.31-78,418.29

Finding the Fourth Proportional to 198,410.11, 297,411.31 and 78,418.29

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Solution

The fourth proportional to 198,410.11, 297,411.31 and 78,418.29 is: 117,546.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,410.11 : 297,411.31 = 78,418.29 : x
  2. Step 2: Convert to fraction form
    198,410.11/297,411.31 = 78,418.29/x
  3. Step 3: Cross multiply
    198,410.11x = 297,411.31 × 78,418.29
  4. Step 4: Simplify right side
    198,410.11x = 23,322,487,570.18
  5. Step 5: Solve for x
    x = 23,322,487,570.18/198,410.11
  6. Step 6: Final answer
    x = 117,546.87

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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.