Home / 138,789.09-191,527.26-78,362.28

Finding the Fourth Proportional to 138,789.09, 191,527.26 and 78,362.28

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Solution

The fourth proportional to 138,789.09, 191,527.26 and 78,362.28 is: 108,139.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,789.09 : 191,527.26 = 78,362.28 : x
  2. Step 2: Convert to fraction form
    138,789.09/191,527.26 = 78,362.28/x
  3. Step 3: Cross multiply
    138,789.09x = 191,527.26 × 78,362.28
  4. Step 4: Simplify right side
    138,789.09x = 15,008,512,922.68
  5. Step 5: Solve for x
    x = 15,008,512,922.68/138,789.09
  6. Step 6: Final answer
    x = 108,139.00

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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.