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Finding the Fourth Proportional to 66,398.91, 91,629.30 and 36,184.49

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Solution

The fourth proportional to 66,398.91, 91,629.30 and 36,184.49 is: 49,933.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,398.91 : 91,629.30 = 36,184.49 : x
  2. Step 2: Convert to fraction form
    66,398.91/91,629.30 = 36,184.49/x
  3. Step 3: Cross multiply
    66,398.91x = 91,629.30 × 36,184.49
  4. Step 4: Simplify right side
    66,398.91x = 3,315,559,031.41
  5. Step 5: Solve for x
    x = 3,315,559,031.41/66,398.91
  6. Step 6: Final answer
    x = 49,933.94

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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.