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Finding the Fourth Proportional to 85,940.46, 128,879.80 and 29,765.44

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Solution

The fourth proportional to 85,940.46, 128,879.80 and 29,765.44 is: 44,637.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,940.46 : 128,879.80 = 29,765.44 : x
  2. Step 2: Convert to fraction form
    85,940.46/128,879.80 = 29,765.44/x
  3. Step 3: Cross multiply
    85,940.46x = 128,879.80 × 29,765.44
  4. Step 4: Simplify right side
    85,940.46x = 3,836,163,954.11
  5. Step 5: Solve for x
    x = 3,836,163,954.11/85,940.46
  6. Step 6: Final answer
    x = 44,637.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.