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Finding the Fourth Proportional to 259,379.81, 389,244.98 and 90,901.84

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Solution

The fourth proportional to 259,379.81, 389,244.98 and 90,901.84 is: 136,414.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,379.81 : 389,244.98 = 90,901.84 : x
  2. Step 2: Convert to fraction form
    259,379.81/389,244.98 = 90,901.84/x
  3. Step 3: Cross multiply
    259,379.81x = 389,244.98 × 90,901.84
  4. Step 4: Simplify right side
    259,379.81x = 35,383,082,492.03
  5. Step 5: Solve for x
    x = 35,383,082,492.03/259,379.81
  6. Step 6: Final answer
    x = 136,414.17

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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.