Home / 208,078.20-312,002.10-67,764.60

Finding the Fourth Proportional to 208,078.20, 312,002.10 and 67,764.60

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Solution

The fourth proportional to 208,078.20, 312,002.10 and 67,764.60 is: 101,609.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,078.20 : 312,002.10 = 67,764.60 : x
  2. Step 2: Convert to fraction form
    208,078.20/312,002.10 = 67,764.60/x
  3. Step 3: Cross multiply
    208,078.20x = 312,002.10 × 67,764.60
  4. Step 4: Simplify right side
    208,078.20x = 21,142,697,505.66
  5. Step 5: Solve for x
    x = 21,142,697,505.66/208,078.20
  6. Step 6: Final answer
    x = 101,609.38

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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.