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Finding the Fourth Proportional to 66,511, 91,785.30 and 36,703

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Solution

The fourth proportional to 66,511, 91,785.30 and 36,703 is: 50,650.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,511 : 91,785.30 = 36,703 : x
  2. Step 2: Convert to fraction form
    66,511/91,785.30 = 36,703/x
  3. Step 3: Cross multiply
    66,511x = 91,785.30 × 36,703
  4. Step 4: Simplify right side
    66,511x = 3,368,795,865.90
  5. Step 5: Solve for x
    x = 3,368,795,865.90/66,511
  6. Step 6: Final answer
    x = 50,650.21

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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.