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Finding the Fourth Proportional to 103,618.92, 142,374.41 and 82,361.28

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Solution

The fourth proportional to 103,618.92, 142,374.41 and 82,361.28 is: 113,166.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,618.92 : 142,374.41 = 82,361.28 : x
  2. Step 2: Convert to fraction form
    103,618.92/142,374.41 = 82,361.28/x
  3. Step 3: Cross multiply
    103,618.92x = 142,374.41 × 82,361.28
  4. Step 4: Simplify right side
    103,618.92x = 11,726,138,646.84
  5. Step 5: Solve for x
    x = 11,726,138,646.84/103,618.92
  6. Step 6: Final answer
    x = 113,166.00

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.