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Finding the Fourth Proportional to 259,754.40, 389,777.40 and 109,969.20

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Solution

The fourth proportional to 259,754.40, 389,777.40 and 109,969.20 is: 165,015.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,754.40 : 389,777.40 = 109,969.20 : x
  2. Step 2: Convert to fraction form
    259,754.40/389,777.40 = 109,969.20/x
  3. Step 3: Cross multiply
    259,754.40x = 389,777.40 × 109,969.20
  4. Step 4: Simplify right side
    259,754.40x = 42,863,508,856.08
  5. Step 5: Solve for x
    x = 42,863,508,856.08/259,754.40
  6. Step 6: Final answer
    x = 165,015.53

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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.