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Finding the Fourth Proportional to 66,653.75, 91,982.79 and 36,438.53

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Solution

The fourth proportional to 66,653.75, 91,982.79 and 36,438.53 is: 50,285.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,653.75 : 91,982.79 = 36,438.53 : x
  2. Step 2: Convert to fraction form
    66,653.75/91,982.79 = 36,438.53/x
  3. Step 3: Cross multiply
    66,653.75x = 91,982.79 × 36,438.53
  4. Step 4: Simplify right side
    66,653.75x = 3,351,717,192.98
  5. Step 5: Solve for x
    x = 3,351,717,192.98/66,653.75
  6. Step 6: Final answer
    x = 50,285.50

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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.