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Finding the Fourth Proportional to 66,650.91, 91,978.02 and 36,436.23

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Solution

The fourth proportional to 66,650.91, 91,978.02 and 36,436.23 is: 50,281.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,650.91 : 91,978.02 = 36,436.23 : x
  2. Step 2: Convert to fraction form
    66,650.91/91,978.02 = 36,436.23/x
  3. Step 3: Cross multiply
    66,650.91x = 91,978.02 × 36,436.23
  4. Step 4: Simplify right side
    66,650.91x = 3,351,332,291.66
  5. Step 5: Solve for x
    x = 3,351,332,291.66/66,650.91
  6. Step 6: Final answer
    x = 50,281.87

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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.