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Finding the Fourth Proportional to 66,836.50, 92,234.39 and 39,980.14

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Solution

The fourth proportional to 66,836.50, 92,234.39 and 39,980.14 is: 55,172.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,836.50 : 92,234.39 = 39,980.14 : x
  2. Step 2: Convert to fraction form
    66,836.50/92,234.39 = 39,980.14/x
  3. Step 3: Cross multiply
    66,836.50x = 92,234.39 × 39,980.14
  4. Step 4: Simplify right side
    66,836.50x = 3,687,543,825.01
  5. Step 5: Solve for x
    x = 3,687,543,825.01/66,836.50
  6. Step 6: Final answer
    x = 55,172.61

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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.