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Finding the Fourth Proportional to 66,990.84, 92,428.41 and 43,131.33

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Solution

The fourth proportional to 66,990.84, 92,428.41 and 43,131.33 is: 59,509.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,990.84 : 92,428.41 = 43,131.33 : x
  2. Step 2: Convert to fraction form
    66,990.84/92,428.41 = 43,131.33/x
  3. Step 3: Cross multiply
    66,990.84x = 92,428.41 × 43,131.33
  4. Step 4: Simplify right side
    66,990.84x = 3,986,560,253.09
  5. Step 5: Solve for x
    x = 3,986,560,253.09/66,990.84
  6. Step 6: Final answer
    x = 59,509.04

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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.