Home / 109,515.40-164,273.10-72,190.60

Finding the Fourth Proportional to 109,515.40, 164,273.10 and 72,190.60

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Solution

The fourth proportional to 109,515.40, 164,273.10 and 72,190.60 is: 108,285.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,515.40 : 164,273.10 = 72,190.60 : x
  2. Step 2: Convert to fraction form
    109,515.40/164,273.10 = 72,190.60/x
  3. Step 3: Cross multiply
    109,515.40x = 164,273.10 × 72,190.60
  4. Step 4: Simplify right side
    109,515.40x = 11,858,973,652.86
  5. Step 5: Solve for x
    x = 11,858,973,652.86/109,515.40
  6. Step 6: Final answer
    x = 108,285.90

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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.