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Finding the Fourth Proportional to 66,531, 91,812.90 and 36,723

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Solution

The fourth proportional to 66,531, 91,812.90 and 36,723 is: 50,677.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,531 : 91,812.90 = 36,723 : x
  2. Step 2: Convert to fraction form
    66,531/91,812.90 = 36,723/x
  3. Step 3: Cross multiply
    66,531x = 91,812.90 × 36,723
  4. Step 4: Simplify right side
    66,531x = 3,371,645,126.70
  5. Step 5: Solve for x
    x = 3,371,645,126.70/66,531
  6. Step 6: Final answer
    x = 50,677.81

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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.