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Finding the Fourth Proportional to 217,892.68, 300,722.16 and 122,406.64

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Solution

The fourth proportional to 217,892.68, 300,722.16 and 122,406.64 is: 168,938.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,892.68 : 300,722.16 = 122,406.64 : x
  2. Step 2: Convert to fraction form
    217,892.68/300,722.16 = 122,406.64/x
  3. Step 3: Cross multiply
    217,892.68x = 300,722.16 × 122,406.64
  4. Step 4: Simplify right side
    217,892.68x = 36,810,389,179.14
  5. Step 5: Solve for x
    x = 36,810,389,179.14/217,892.68
  6. Step 6: Final answer
    x = 168,938.16

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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.