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Finding the Fourth Proportional to 141,998.56, 195,961.68 and 78,337.12

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Solution

The fourth proportional to 141,998.56, 195,961.68 and 78,337.12 is: 108,107.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,998.56 : 195,961.68 = 78,337.12 : x
  2. Step 2: Convert to fraction form
    141,998.56/195,961.68 = 78,337.12/x
  3. Step 3: Cross multiply
    141,998.56x = 195,961.68 × 78,337.12
  4. Step 4: Simplify right side
    141,998.56x = 15,351,073,641.56
  5. Step 5: Solve for x
    x = 15,351,073,641.56/141,998.56
  6. Step 6: Final answer
    x = 108,107.25

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1.5x scale

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.