Home / 215,866.30-323,771.10-66,121.60

Finding the Fourth Proportional to 215,866.30, 323,771.10 and 66,121.60

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Solution

The fourth proportional to 215,866.30, 323,771.10 and 66,121.60 is: 99,173.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,866.30 : 323,771.10 = 66,121.60 : x
  2. Step 2: Convert to fraction form
    215,866.30/323,771.10 = 66,121.60/x
  3. Step 3: Cross multiply
    215,866.30x = 323,771.10 × 66,121.60
  4. Step 4: Simplify right side
    215,866.30x = 21,408,263,165.76
  5. Step 5: Solve for x
    x = 21,408,263,165.76/215,866.30
  6. Step 6: Final answer
    x = 99,173.72

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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.