Home / 345,743.20-518,687.70-109,109.80

Finding the Fourth Proportional to 345,743.20, 518,687.70 and 109,109.80

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Solution

The fourth proportional to 345,743.20, 518,687.70 and 109,109.80 is: 163,687.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,743.20 : 518,687.70 = 109,109.80 : x
  2. Step 2: Convert to fraction form
    345,743.20/518,687.70 = 109,109.80/x
  3. Step 3: Cross multiply
    345,743.20x = 518,687.70 × 109,109.80
  4. Step 4: Simplify right side
    345,743.20x = 56,593,911,209.46
  5. Step 5: Solve for x
    x = 56,593,911,209.46/345,743.20
  6. Step 6: Final answer
    x = 163,687.71

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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.