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Finding the Fourth Proportional to 66,408.80, 91,641.47 and 36,193.47

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Solution

The fourth proportional to 66,408.80, 91,641.47 and 36,193.47 is: 49,945.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,408.80 : 91,641.47 = 36,193.47 : x
  2. Step 2: Convert to fraction form
    66,408.80/91,641.47 = 36,193.47/x
  3. Step 3: Cross multiply
    66,408.80x = 91,641.47 × 36,193.47
  4. Step 4: Simplify right side
    66,408.80x = 3,316,822,336.99
  5. Step 5: Solve for x
    x = 3,316,822,336.99/66,408.80
  6. Step 6: Final answer
    x = 49,945.53

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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.