Home / 105,991.68-146,325.40-81,739.60

Finding the Fourth Proportional to 105,991.68, 146,325.40 and 81,739.60

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Solution

The fourth proportional to 105,991.68, 146,325.40 and 81,739.60 is: 112,844.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,991.68 : 146,325.40 = 81,739.60 : x
  2. Step 2: Convert to fraction form
    105,991.68/146,325.40 = 81,739.60/x
  3. Step 3: Cross multiply
    105,991.68x = 146,325.40 × 81,739.60
  4. Step 4: Simplify right side
    105,991.68x = 11,960,579,665.84
  5. Step 5: Solve for x
    x = 11,960,579,665.84/105,991.68
  6. Step 6: Final answer
    x = 112,844.51

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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.