Home / 198,340.18-297,628.50-71,990.31

Finding the Fourth Proportional to 198,340.18, 297,628.50 and 71,990.31

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Solution

The fourth proportional to 198,340.18, 297,628.50 and 71,990.31 is: 108,028.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,340.18 : 297,628.50 = 71,990.31 : x
  2. Step 2: Convert to fraction form
    198,340.18/297,628.50 = 71,990.31/x
  3. Step 3: Cross multiply
    198,340.18x = 297,628.50 × 71,990.31
  4. Step 4: Simplify right side
    198,340.18x = 21,426,367,979.84
  5. Step 5: Solve for x
    x = 21,426,367,979.84/198,340.18
  6. Step 6: Final answer
    x = 108,028.38

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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.