Home / 109,021.20-163,531.80-90,589.20

Finding the Fourth Proportional to 109,021.20, 163,531.80 and 90,589.20

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Solution

The fourth proportional to 109,021.20, 163,531.80 and 90,589.20 is: 135,883.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,021.20 : 163,531.80 = 90,589.20 : x
  2. Step 2: Convert to fraction form
    109,021.20/163,531.80 = 90,589.20/x
  3. Step 3: Cross multiply
    109,021.20x = 163,531.80 × 90,589.20
  4. Step 4: Simplify right side
    109,021.20x = 14,814,214,936.56
  5. Step 5: Solve for x
    x = 14,814,214,936.56/109,021.20
  6. Step 6: Final answer
    x = 135,883.80

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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.