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Finding the Fourth Proportional to 66,072, 91,180.80 and 36,264

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Solution

The fourth proportional to 66,072, 91,180.80 and 36,264 is: 50,045.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,072 : 91,180.80 = 36,264 : x
  2. Step 2: Convert to fraction form
    66,072/91,180.80 = 36,264/x
  3. Step 3: Cross multiply
    66,072x = 91,180.80 × 36,264
  4. Step 4: Simplify right side
    66,072x = 3,306,580,531.20
  5. Step 5: Solve for x
    x = 3,306,580,531.20/66,072
  6. Step 6: Final answer
    x = 50,045.11

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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.