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Finding the Fourth Proportional to 49,408.70, 74,113.20 and 11,968.70

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Solution

The fourth proportional to 49,408.70, 74,113.20 and 11,968.70 is: 17,953.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,408.70 : 74,113.20 = 11,968.70 : x
  2. Step 2: Convert to fraction form
    49,408.70/74,113.20 = 11,968.70/x
  3. Step 3: Cross multiply
    49,408.70x = 74,113.20 × 11,968.70
  4. Step 4: Simplify right side
    49,408.70x = 887,038,286.27
  5. Step 5: Solve for x
    x = 887,038,286.27/49,408.70
  6. Step 6: Final answer
    x = 17,953.08

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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.