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Finding the Fourth Proportional to 208,830.20, 313,026.60 and 82,421.60

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Solution

The fourth proportional to 208,830.20, 313,026.60 and 82,421.60 is: 123,546.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,830.20 : 313,026.60 = 82,421.60 : x
  2. Step 2: Convert to fraction form
    208,830.20/313,026.60 = 82,421.60/x
  3. Step 3: Cross multiply
    208,830.20x = 313,026.60 × 82,421.60
  4. Step 4: Simplify right side
    208,830.20x = 25,800,153,214.56
  5. Step 5: Solve for x
    x = 25,800,153,214.56/208,830.20
  6. Step 6: Final answer
    x = 123,546.08

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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.