Home / 120,198.12-165,907.90-79,392.10

Finding the Fourth Proportional to 120,198.12, 165,907.90 and 79,392.10

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Solution

The fourth proportional to 120,198.12, 165,907.90 and 79,392.10 is: 109,583.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,198.12 : 165,907.90 = 79,392.10 : x
  2. Step 2: Convert to fraction form
    120,198.12/165,907.90 = 79,392.10/x
  3. Step 3: Cross multiply
    120,198.12x = 165,907.90 × 79,392.10
  4. Step 4: Simplify right side
    120,198.12x = 13,171,776,587.59
  5. Step 5: Solve for x
    x = 13,171,776,587.59/120,198.12
  6. Step 6: Final answer
    x = 109,583.88

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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.