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Finding the Fourth Proportional to 140,912.70, 211,369.05 and 47,408.70

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Solution

The fourth proportional to 140,912.70, 211,369.05 and 47,408.70 is: 71,113.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,912.70 : 211,369.05 = 47,408.70 : x
  2. Step 2: Convert to fraction form
    140,912.70/211,369.05 = 47,408.70/x
  3. Step 3: Cross multiply
    140,912.70x = 211,369.05 × 47,408.70
  4. Step 4: Simplify right side
    140,912.70x = 10,020,731,880.74
  5. Step 5: Solve for x
    x = 10,020,731,880.74/140,912.70
  6. Step 6: Final answer
    x = 71,113.05

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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.