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Finding the Fourth Proportional to 217,238.67, 299,801.21 and 121,776.03

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Solution

The fourth proportional to 217,238.67, 299,801.21 and 121,776.03 is: 168,057.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,238.67 : 299,801.21 = 121,776.03 : x
  2. Step 2: Convert to fraction form
    217,238.67/299,801.21 = 121,776.03/x
  3. Step 3: Cross multiply
    217,238.67x = 299,801.21 × 121,776.03
  4. Step 4: Simplify right side
    217,238.67x = 36,508,600,534.12
  5. Step 5: Solve for x
    x = 36,508,600,534.12/217,238.67
  6. Step 6: Final answer
    x = 168,057.56

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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.