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Finding the Fourth Proportional to 215,008.60, 322,512.90 and 136,211.80

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Solution

The fourth proportional to 215,008.60, 322,512.90 and 136,211.80 is: 204,317.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,008.60 : 322,512.90 = 136,211.80 : x
  2. Step 2: Convert to fraction form
    215,008.60/322,512.90 = 136,211.80/x
  3. Step 3: Cross multiply
    215,008.60x = 322,512.90 × 136,211.80
  4. Step 4: Simplify right side
    215,008.60x = 43,930,062,632.22
  5. Step 5: Solve for x
    x = 43,930,062,632.22/215,008.60
  6. Step 6: Final answer
    x = 204,317.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.