Home / 138,119.78-190,551.34-77,676.57

Finding the Fourth Proportional to 138,119.78, 190,551.34 and 77,676.57

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Solution

The fourth proportional to 138,119.78, 190,551.34 and 77,676.57 is: 107,163.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,119.78 : 190,551.34 = 77,676.57 : x
  2. Step 2: Convert to fraction form
    138,119.78/190,551.34 = 77,676.57/x
  3. Step 3: Cross multiply
    138,119.78x = 190,551.34 × 77,676.57
  4. Step 4: Simplify right side
    138,119.78x = 14,801,374,160.27
  5. Step 5: Solve for x
    x = 14,801,374,160.27/138,119.78
  6. Step 6: Final answer
    x = 107,163.32

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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.