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Finding the Fourth Proportional to 141,161.76, 211,830.42 and 87,958.20

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Solution

The fourth proportional to 141,161.76, 211,830.42 and 87,958.20 is: 131,992.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,161.76 : 211,830.42 = 87,958.20 : x
  2. Step 2: Convert to fraction form
    141,161.76/211,830.42 = 87,958.20/x
  3. Step 3: Cross multiply
    141,161.76x = 211,830.42 × 87,958.20
  4. Step 4: Simplify right side
    141,161.76x = 18,632,222,448.44
  5. Step 5: Solve for x
    x = 18,632,222,448.44/141,161.76
  6. Step 6: Final answer
    x = 131,992.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.