Home / 105,112.19-145,052.80-57,365.88

Finding the Fourth Proportional to 105,112.19, 145,052.80 and 57,365.88

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Solution

The fourth proportional to 105,112.19, 145,052.80 and 57,365.88 is: 79,163.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,112.19 : 145,052.80 = 57,365.88 : x
  2. Step 2: Convert to fraction form
    105,112.19/145,052.80 = 57,365.88/x
  3. Step 3: Cross multiply
    105,112.19x = 145,052.80 × 57,365.88
  4. Step 4: Simplify right side
    105,112.19x = 8,321,081,375.05
  5. Step 5: Solve for x
    x = 8,321,081,375.05/105,112.19
  6. Step 6: Final answer
    x = 79,163.81

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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.