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Finding the Fourth Proportional to 213,791.43, 320,737.01 and 61,991.67

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Solution

The fourth proportional to 213,791.43, 320,737.01 and 61,991.67 is: 93,001.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,791.43 : 320,737.01 = 61,991.67 : x
  2. Step 2: Convert to fraction form
    213,791.43/320,737.01 = 61,991.67/x
  3. Step 3: Cross multiply
    213,791.43x = 320,737.01 × 61,991.67
  4. Step 4: Simplify right side
    213,791.43x = 19,883,022,880.71
  5. Step 5: Solve for x
    x = 19,883,022,880.71/213,791.43
  6. Step 6: Final answer
    x = 93,001.96

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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.