Home / 211,865.19-317,755.85-105,137.79

Finding the Fourth Proportional to 211,865.19, 317,755.85 and 105,137.79

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Solution

The fourth proportional to 211,865.19, 317,755.85 and 105,137.79 is: 157,685.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,865.19 : 317,755.85 = 105,137.79 : x
  2. Step 2: Convert to fraction form
    211,865.19/317,755.85 = 105,137.79/x
  3. Step 3: Cross multiply
    211,865.19x = 317,755.85 × 105,137.79
  4. Step 4: Simplify right side
    211,865.19x = 33,408,147,302.88
  5. Step 5: Solve for x
    x = 33,408,147,302.88/211,865.19
  6. Step 6: Final answer
    x = 157,685.87

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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.