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Finding the Fourth Proportional to 66,378.10, 91,604.01 and 36,165.82

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Solution

The fourth proportional to 66,378.10, 91,604.01 and 36,165.82 is: 49,910.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,378.10 : 91,604.01 = 36,165.82 : x
  2. Step 2: Convert to fraction form
    66,378.10/91,604.01 = 36,165.82/x
  3. Step 3: Cross multiply
    66,378.10x = 91,604.01 × 36,165.82
  4. Step 4: Simplify right side
    66,378.10x = 3,312,934,136.94
  5. Step 5: Solve for x
    x = 3,312,934,136.94/66,378.10
  6. Step 6: Final answer
    x = 49,910.05

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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.