Home / 141,828.72-195,719-78,165.36

Finding the Fourth Proportional to 141,828.72, 195,719 and 78,165.36

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Solution

The fourth proportional to 141,828.72, 195,719 and 78,165.36 is: 107,865.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,828.72 : 195,719 = 78,165.36 : x
  2. Step 2: Convert to fraction form
    141,828.72/195,719 = 78,165.36/x
  3. Step 3: Cross multiply
    141,828.72x = 195,719 × 78,165.36
  4. Step 4: Simplify right side
    141,828.72x = 15,298,446,093.84
  5. Step 5: Solve for x
    x = 15,298,446,093.84/141,828.72
  6. Step 6: Final answer
    x = 107,865.64

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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.