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Finding the Fourth Proportional to 209,912.82, 314,888.14 and 67,761.48

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Solution

The fourth proportional to 209,912.82, 314,888.14 and 67,761.48 is: 101,648.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,912.82 : 314,888.14 = 67,761.48 : x
  2. Step 2: Convert to fraction form
    209,912.82/314,888.14 = 67,761.48/x
  3. Step 3: Cross multiply
    209,912.82x = 314,888.14 × 67,761.48
  4. Step 4: Simplify right side
    209,912.82x = 21,337,286,400.85
  5. Step 5: Solve for x
    x = 21,337,286,400.85/209,912.82
  6. Step 6: Final answer
    x = 101,648.32

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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.