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Finding the Fourth Proportional to 66,978.85, 92,429.32 and 36,763.96

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Solution

The fourth proportional to 66,978.85, 92,429.32 and 36,763.96 is: 50,733.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,978.85 : 92,429.32 = 36,763.96 : x
  2. Step 2: Convert to fraction form
    66,978.85/92,429.32 = 36,763.96/x
  3. Step 3: Cross multiply
    66,978.85x = 92,429.32 × 36,763.96
  4. Step 4: Simplify right side
    66,978.85x = 3,398,067,639.49
  5. Step 5: Solve for x
    x = 3,398,067,639.49/66,978.85
  6. Step 6: Final answer
    x = 50,733.44

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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.