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Finding the Fourth Proportional to 217,331.78, 325,969.98 and 84,120.90

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Solution

The fourth proportional to 217,331.78, 325,969.98 and 84,120.90 is: 126,170.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,331.78 : 325,969.98 = 84,120.90 : x
  2. Step 2: Convert to fraction form
    217,331.78/325,969.98 = 84,120.90/x
  3. Step 3: Cross multiply
    217,331.78x = 325,969.98 × 84,120.90
  4. Step 4: Simplify right side
    217,331.78x = 27,420,888,090.58
  5. Step 5: Solve for x
    x = 27,420,888,090.58/217,331.78
  6. Step 6: Final answer
    x = 126,170.63

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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.