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Finding the Fourth Proportional to 66,408.76, 91,645.40 and 36,195.36

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Solution

The fourth proportional to 66,408.76, 91,645.40 and 36,195.36 is: 49,950.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,408.76 : 91,645.40 = 36,195.36 : x
  2. Step 2: Convert to fraction form
    66,408.76/91,645.40 = 36,195.36/x
  3. Step 3: Cross multiply
    66,408.76x = 91,645.40 × 36,195.36
  4. Step 4: Simplify right side
    66,408.76x = 3,317,138,245.34
  5. Step 5: Solve for x
    x = 3,317,138,245.34/66,408.76
  6. Step 6: Final answer
    x = 49,950.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.