Home / 289,229.05-399,131.71-161,909.20

Finding the Fourth Proportional to 289,229.05, 399,131.71 and 161,909.20

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Solution

The fourth proportional to 289,229.05, 399,131.71 and 161,909.20 is: 223,432.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,229.05 : 399,131.71 = 161,909.20 : x
  2. Step 2: Convert to fraction form
    289,229.05/399,131.71 = 161,909.20/x
  3. Step 3: Cross multiply
    289,229.05x = 399,131.71 × 161,909.20
  4. Step 4: Simplify right side
    289,229.05x = 64,623,095,860.73
  5. Step 5: Solve for x
    x = 64,623,095,860.73/289,229.05
  6. Step 6: Final answer
    x = 223,432.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.