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Finding the Fourth Proportional to 218,221.90, 301,121.72 and 122,726.56

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Solution

The fourth proportional to 218,221.90, 301,121.72 and 122,726.56 is: 169,348.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,221.90 : 301,121.72 = 122,726.56 : x
  2. Step 2: Convert to fraction form
    218,221.90/301,121.72 = 122,726.56/x
  3. Step 3: Cross multiply
    218,221.90x = 301,121.72 × 122,726.56
  4. Step 4: Simplify right side
    218,221.90x = 36,955,632,836.88
  5. Step 5: Solve for x
    x = 36,955,632,836.88/218,221.90
  6. Step 6: Final answer
    x = 169,348.87

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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.