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Finding the Fourth Proportional to 66,408.63, 91,643.97 and 36,193.97

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Solution

The fourth proportional to 66,408.63, 91,643.97 and 36,193.97 is: 49,947.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,408.63 : 91,643.97 = 36,193.97 : x
  2. Step 2: Convert to fraction form
    66,408.63/91,643.97 = 36,193.97/x
  3. Step 3: Cross multiply
    66,408.63x = 91,643.97 × 36,193.97
  4. Step 4: Simplify right side
    66,408.63x = 3,316,959,465.70
  5. Step 5: Solve for x
    x = 3,316,959,465.70/66,408.63
  6. Step 6: Final answer
    x = 49,947.72

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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.