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Finding the Fourth Proportional to 259,395.24, 389,129.24 and 90,876.96

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Solution

The fourth proportional to 259,395.24, 389,129.24 and 90,876.96 is: 136,328.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,395.24 : 389,129.24 = 90,876.96 : x
  2. Step 2: Convert to fraction form
    259,395.24/389,129.24 = 90,876.96/x
  3. Step 3: Cross multiply
    259,395.24x = 389,129.24 × 90,876.96
  4. Step 4: Simplify right side
    259,395.24x = 35,362,882,378.31
  5. Step 5: Solve for x
    x = 35,362,882,378.31/259,395.24
  6. Step 6: Final answer
    x = 136,328.19

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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.