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Finding the Fourth Proportional to 66,211, 91,371.18 and 36,403

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Solution

The fourth proportional to 66,211, 91,371.18 and 36,403 is: 50,236.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,211 : 91,371.18 = 36,403 : x
  2. Step 2: Convert to fraction form
    66,211/91,371.18 = 36,403/x
  3. Step 3: Cross multiply
    66,211x = 91,371.18 × 36,403
  4. Step 4: Simplify right side
    66,211x = 3,326,185,065.54
  5. Step 5: Solve for x
    x = 3,326,185,065.54/66,211
  6. Step 6: Final answer
    x = 50,236.14

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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.