Home / 129,845.43-179,189.72-81,449.42

Finding the Fourth Proportional to 129,845.43, 179,189.72 and 81,449.42

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Solution

The fourth proportional to 129,845.43, 179,189.72 and 81,449.42 is: 112,402.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,845.43 : 179,189.72 = 81,449.42 : x
  2. Step 2: Convert to fraction form
    129,845.43/179,189.72 = 81,449.42/x
  3. Step 3: Cross multiply
    129,845.43x = 179,189.72 × 81,449.42
  4. Step 4: Simplify right side
    129,845.43x = 14,594,897,460.77
  5. Step 5: Solve for x
    x = 14,594,897,460.77/129,845.43
  6. Step 6: Final answer
    x = 112,402.09

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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.