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Finding the Fourth Proportional to 215,860.60, 323,815.20 and 66,099.70

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Solution

The fourth proportional to 215,860.60, 323,815.20 and 66,099.70 is: 99,156.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,860.60 : 323,815.20 = 66,099.70 : x
  2. Step 2: Convert to fraction form
    215,860.60/323,815.20 = 66,099.70/x
  3. Step 3: Cross multiply
    215,860.60x = 323,815.20 × 66,099.70
  4. Step 4: Simplify right side
    215,860.60x = 21,404,087,575.44
  5. Step 5: Solve for x
    x = 21,404,087,575.44/215,860.60
  6. Step 6: Final answer
    x = 99,156.99

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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.