Home / 138,369.06-190,939.68-81,769.50

Finding the Fourth Proportional to 138,369.06, 190,939.68 and 81,769.50

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Solution

The fourth proportional to 138,369.06, 190,939.68 and 81,769.50 is: 112,836.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,369.06 : 190,939.68 = 81,769.50 : x
  2. Step 2: Convert to fraction form
    138,369.06/190,939.68 = 81,769.50/x
  3. Step 3: Cross multiply
    138,369.06x = 190,939.68 × 81,769.50
  4. Step 4: Simplify right side
    138,369.06x = 15,613,042,163.76
  5. Step 5: Solve for x
    x = 15,613,042,163.76/138,369.06
  6. Step 6: Final answer
    x = 112,836.22

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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.