Home / 120,142.22-165,800.97-79,786.40

Finding the Fourth Proportional to 120,142.22, 165,800.97 and 79,786.40

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Solution

The fourth proportional to 120,142.22, 165,800.97 and 79,786.40 is: 110,108.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,142.22 : 165,800.97 = 79,786.40 : x
  2. Step 2: Convert to fraction form
    120,142.22/165,800.97 = 79,786.40/x
  3. Step 3: Cross multiply
    120,142.22x = 165,800.97 × 79,786.40
  4. Step 4: Simplify right side
    120,142.22x = 13,228,662,512.81
  5. Step 5: Solve for x
    x = 13,228,662,512.81/120,142.22
  6. Step 6: Final answer
    x = 110,108.36

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1.5x scale

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.