Home / 120,105.09-165,757.05-103,165.29

Finding the Fourth Proportional to 120,105.09, 165,757.05 and 103,165.29

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Solution

The fourth proportional to 120,105.09, 165,757.05 and 103,165.29 is: 142,378.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,105.09 : 165,757.05 = 103,165.29 : x
  2. Step 2: Convert to fraction form
    120,105.09/165,757.05 = 103,165.29/x
  3. Step 3: Cross multiply
    120,105.09x = 165,757.05 × 103,165.29
  4. Step 4: Simplify right side
    120,105.09x = 17,100,374,132.79
  5. Step 5: Solve for x
    x = 17,100,374,132.79/120,105.09
  6. Step 6: Final answer
    x = 142,378.43

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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.