Home / 109,375.20-164,235.60-79,999.20

Finding the Fourth Proportional to 109,375.20, 164,235.60 and 79,999.20

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Solution

The fourth proportional to 109,375.20, 164,235.60 and 79,999.20 is: 120,125.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,375.20 : 164,235.60 = 79,999.20 : x
  2. Step 2: Convert to fraction form
    109,375.20/164,235.60 = 79,999.20/x
  3. Step 3: Cross multiply
    109,375.20x = 164,235.60 × 79,999.20
  4. Step 4: Simplify right side
    109,375.20x = 13,138,716,611.52
  5. Step 5: Solve for x
    x = 13,138,716,611.52/109,375.20
  6. Step 6: Final answer
    x = 120,125.19

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1.5x scale

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.