Home / 75,128.10-103,676.81-41,138.75

Finding the Fourth Proportional to 75,128.10, 103,676.81 and 41,138.75

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Solution

The fourth proportional to 75,128.10, 103,676.81 and 41,138.75 is: 56,771.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,128.10 : 103,676.81 = 41,138.75 : x
  2. Step 2: Convert to fraction form
    75,128.10/103,676.81 = 41,138.75/x
  3. Step 3: Cross multiply
    75,128.10x = 103,676.81 × 41,138.75
  4. Step 4: Simplify right side
    75,128.10x = 4,265,134,367.39
  5. Step 5: Solve for x
    x = 4,265,134,367.39/75,128.10
  6. Step 6: Final answer
    x = 56,771.49

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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.