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Finding the Fourth Proportional to 140,791.70, 210,662.66 and 139,217.06

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Solution

The fourth proportional to 140,791.70, 210,662.66 and 139,217.06 is: 208,306.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,791.70 : 210,662.66 = 139,217.06 : x
  2. Step 2: Convert to fraction form
    140,791.70/210,662.66 = 139,217.06/x
  3. Step 3: Cross multiply
    140,791.70x = 210,662.66 × 139,217.06
  4. Step 4: Simplify right side
    140,791.70x = 29,327,836,176.98
  5. Step 5: Solve for x
    x = 29,327,836,176.98/140,791.70
  6. Step 6: Final answer
    x = 208,306.57

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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.