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Finding the Fourth Proportional to 208,314.73, 312,488.30 and 68,087.53

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Solution

The fourth proportional to 208,314.73, 312,488.30 and 68,087.53 is: 102,136.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,314.73 : 312,488.30 = 68,087.53 : x
  2. Step 2: Convert to fraction form
    208,314.73/312,488.30 = 68,087.53/x
  3. Step 3: Cross multiply
    208,314.73x = 312,488.30 × 68,087.53
  4. Step 4: Simplify right side
    208,314.73x = 21,276,556,500.90
  5. Step 5: Solve for x
    x = 21,276,556,500.90/208,314.73
  6. Step 6: Final answer
    x = 102,136.59

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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.