Home / 138,357.06-190,950.83-77,939.34

Finding the Fourth Proportional to 138,357.06, 190,950.83 and 77,939.34

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Solution

The fourth proportional to 138,357.06, 190,950.83 and 77,939.34 is: 107,566.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,357.06 : 190,950.83 = 77,939.34 : x
  2. Step 2: Convert to fraction form
    138,357.06/190,950.83 = 77,939.34/x
  3. Step 3: Cross multiply
    138,357.06x = 190,950.83 × 77,939.34
  4. Step 4: Simplify right side
    138,357.06x = 14,882,581,662.65
  5. Step 5: Solve for x
    x = 14,882,581,662.65/138,357.06
  6. Step 6: Final answer
    x = 107,566.48

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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.