Home / 100,105.06-149,999.53-81,293.56

Finding the Fourth Proportional to 100,105.06, 149,999.53 and 81,293.56

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Solution

The fourth proportional to 100,105.06, 149,999.53 and 81,293.56 is: 121,811.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,105.06 : 149,999.53 = 81,293.56 : x
  2. Step 2: Convert to fraction form
    100,105.06/149,999.53 = 81,293.56/x
  3. Step 3: Cross multiply
    100,105.06x = 149,999.53 × 81,293.56
  4. Step 4: Simplify right side
    100,105.06x = 12,193,995,792.03
  5. Step 5: Solve for x
    x = 12,193,995,792.03/100,105.06
  6. Step 6: Final answer
    x = 121,811.98

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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.