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Finding the Fourth Proportional to 217,440.99, 300,080.97 and 121,940.10

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Solution

The fourth proportional to 217,440.99, 300,080.97 and 121,940.10 is: 168,284.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,440.99 : 300,080.97 = 121,940.10 : x
  2. Step 2: Convert to fraction form
    217,440.99/300,080.97 = 121,940.10/x
  3. Step 3: Cross multiply
    217,440.99x = 300,080.97 × 121,940.10
  4. Step 4: Simplify right side
    217,440.99x = 36,591,903,489.90
  5. Step 5: Solve for x
    x = 36,591,903,489.90/217,440.99
  6. Step 6: Final answer
    x = 168,284.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.