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Finding the Fourth Proportional to 81,361.70, 122,050.58 and 28,046.66

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Solution

The fourth proportional to 81,361.70, 122,050.58 and 28,046.66 is: 42,072.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,361.70 : 122,050.58 = 28,046.66 : x
  2. Step 2: Convert to fraction form
    81,361.70/122,050.58 = 28,046.66/x
  3. Step 3: Cross multiply
    81,361.70x = 122,050.58 × 28,046.66
  4. Step 4: Simplify right side
    81,361.70x = 3,423,111,495.31
  5. Step 5: Solve for x
    x = 3,423,111,495.31/81,361.70
  6. Step 6: Final answer
    x = 42,072.76

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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.