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Finding the Fourth Proportional to 217,233.28, 299,790.48 and 121,739.14

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Solution

The fourth proportional to 217,233.28, 299,790.48 and 121,739.14 is: 168,004.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,233.28 : 299,790.48 = 121,739.14 : x
  2. Step 2: Convert to fraction form
    217,233.28/299,790.48 = 121,739.14/x
  3. Step 3: Cross multiply
    217,233.28x = 299,790.48 × 121,739.14
  4. Step 4: Simplify right side
    217,233.28x = 36,496,235,215.39
  5. Step 5: Solve for x
    x = 36,496,235,215.39/217,233.28
  6. Step 6: Final answer
    x = 168,004.81

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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.