Home / 138,183.22-190,708.32-77,768.56

Finding the Fourth Proportional to 138,183.22, 190,708.32 and 77,768.56

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Solution

The fourth proportional to 138,183.22, 190,708.32 and 77,768.56 is: 107,329.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,183.22 : 190,708.32 = 77,768.56 : x
  2. Step 2: Convert to fraction form
    138,183.22/190,708.32 = 77,768.56/x
  3. Step 3: Cross multiply
    138,183.22x = 190,708.32 × 77,768.56
  4. Step 4: Simplify right side
    138,183.22x = 14,831,111,426.42
  5. Step 5: Solve for x
    x = 14,831,111,426.42/138,183.22
  6. Step 6: Final answer
    x = 107,329.32

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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.