Home / 141,905.14-195,830.43-78,245.20

Finding the Fourth Proportional to 141,905.14, 195,830.43 and 78,245.20

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Solution

The fourth proportional to 141,905.14, 195,830.43 and 78,245.20 is: 107,979.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,905.14 : 195,830.43 = 78,245.20 : x
  2. Step 2: Convert to fraction form
    141,905.14/195,830.43 = 78,245.20/x
  3. Step 3: Cross multiply
    141,905.14x = 195,830.43 × 78,245.20
  4. Step 4: Simplify right side
    141,905.14x = 15,322,791,161.44
  5. Step 5: Solve for x
    x = 15,322,791,161.44/141,905.14
  6. Step 6: Final answer
    x = 107,979.11

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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.