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Finding the Fourth Proportional to 84,250.56, 126,375.78 and 21,921.06

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Solution

The fourth proportional to 84,250.56, 126,375.78 and 21,921.06 is: 32,881.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,250.56 : 126,375.78 = 21,921.06 : x
  2. Step 2: Convert to fraction form
    84,250.56/126,375.78 = 21,921.06/x
  3. Step 3: Cross multiply
    84,250.56x = 126,375.78 × 21,921.06
  4. Step 4: Simplify right side
    84,250.56x = 2,770,291,055.93
  5. Step 5: Solve for x
    x = 2,770,291,055.93/84,250.56
  6. Step 6: Final answer
    x = 32,881.57

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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.