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Finding the Fourth Proportional to 66,939.81, 92,376.41 and 38,661.09

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Solution

The fourth proportional to 66,939.81, 92,376.41 and 38,661.09 is: 53,352.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,939.81 : 92,376.41 = 38,661.09 : x
  2. Step 2: Convert to fraction form
    66,939.81/92,376.41 = 38,661.09/x
  3. Step 3: Cross multiply
    66,939.81x = 92,376.41 × 38,661.09
  4. Step 4: Simplify right side
    66,939.81x = 3,571,372,700.89
  5. Step 5: Solve for x
    x = 3,571,372,700.89/66,939.81
  6. Step 6: Final answer
    x = 53,352.00

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.