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Finding the Fourth Proportional to 66,992.80, 100,604.40 and 47,408.80

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Solution

The fourth proportional to 66,992.80, 100,604.40 and 47,408.80 is: 71,194.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,992.80 : 100,604.40 = 47,408.80 : x
  2. Step 2: Convert to fraction form
    66,992.80/100,604.40 = 47,408.80/x
  3. Step 3: Cross multiply
    66,992.80x = 100,604.40 × 47,408.80
  4. Step 4: Simplify right side
    66,992.80x = 4,769,533,878.72
  5. Step 5: Solve for x
    x = 4,769,533,878.72/66,992.80
  6. Step 6: Final answer
    x = 71,194.72

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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.