Home / 138,238.56-190,759.32-77,806.08

Finding the Fourth Proportional to 138,238.56, 190,759.32 and 77,806.08

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Solution

The fourth proportional to 138,238.56, 190,759.32 and 77,806.08 is: 107,366.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,238.56 : 190,759.32 = 77,806.08 : x
  2. Step 2: Convert to fraction form
    138,238.56/190,759.32 = 77,806.08/x
  3. Step 3: Cross multiply
    138,238.56x = 190,759.32 × 77,806.08
  4. Step 4: Simplify right side
    138,238.56x = 14,842,234,912.67
  5. Step 5: Solve for x
    x = 14,842,234,912.67/138,238.56
  6. Step 6: Final answer
    x = 107,366.82

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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.