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Finding the Fourth Proportional to 208,873.60, 313,310.40 and 138,014.80

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Solution

The fourth proportional to 208,873.60, 313,310.40 and 138,014.80 is: 207,022.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,873.60 : 313,310.40 = 138,014.80 : x
  2. Step 2: Convert to fraction form
    208,873.60/313,310.40 = 138,014.80/x
  3. Step 3: Cross multiply
    208,873.60x = 313,310.40 × 138,014.80
  4. Step 4: Simplify right side
    208,873.60x = 43,241,472,193.92
  5. Step 5: Solve for x
    x = 43,241,472,193.92/208,873.60
  6. Step 6: Final answer
    x = 207,022.20

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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.