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Finding the Fourth Proportional to 66,211.25, 91,371.53 and 36,403.25

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Solution

The fourth proportional to 66,211.25, 91,371.53 and 36,403.25 is: 50,236.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,211.25 : 91,371.53 = 36,403.25 : x
  2. Step 2: Convert to fraction form
    66,211.25/91,371.53 = 36,403.25/x
  3. Step 3: Cross multiply
    66,211.25x = 91,371.53 × 36,403.25
  4. Step 4: Simplify right side
    66,211.25x = 3,326,220,467.46
  5. Step 5: Solve for x
    x = 3,326,220,467.46/66,211.25
  6. Step 6: Final answer
    x = 50,236.49

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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.