Home / 259,861.15-389,828.63-79,961.50

Finding the Fourth Proportional to 259,861.15, 389,828.63 and 79,961.50

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Solution

The fourth proportional to 259,861.15, 389,828.63 and 79,961.50 is: 119,953.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,861.15 : 389,828.63 = 79,961.50 : x
  2. Step 2: Convert to fraction form
    259,861.15/389,828.63 = 79,961.50/x
  3. Step 3: Cross multiply
    259,861.15x = 389,828.63 × 79,961.50
  4. Step 4: Simplify right side
    259,861.15x = 31,171,281,997.75
  5. Step 5: Solve for x
    x = 31,171,281,997.75/259,861.15
  6. Step 6: Final answer
    x = 119,953.61

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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.