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Finding the Fourth Proportional to 66,890.21, 92,308.13 and 36,676.81

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Solution

The fourth proportional to 66,890.21, 92,308.13 and 36,676.81 is: 50,613.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,890.21 : 92,308.13 = 36,676.81 : x
  2. Step 2: Convert to fraction form
    66,890.21/92,308.13 = 36,676.81/x
  3. Step 3: Cross multiply
    66,890.21x = 92,308.13 × 36,676.81
  4. Step 4: Simplify right side
    66,890.21x = 3,385,567,331.31
  5. Step 5: Solve for x
    x = 3,385,567,331.31/66,890.21
  6. Step 6: Final answer
    x = 50,613.79

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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.