Home / 259,516.40-389,226.60-72,489.20

Finding the Fourth Proportional to 259,516.40, 389,226.60 and 72,489.20

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Solution

The fourth proportional to 259,516.40, 389,226.60 and 72,489.20 is: 108,720.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,516.40 : 389,226.60 = 72,489.20 : x
  2. Step 2: Convert to fraction form
    259,516.40/389,226.60 = 72,489.20/x
  3. Step 3: Cross multiply
    259,516.40x = 389,226.60 × 72,489.20
  4. Step 4: Simplify right side
    259,516.40x = 28,214,724,852.72
  5. Step 5: Solve for x
    x = 28,214,724,852.72/259,516.40
  6. Step 6: Final answer
    x = 108,720.39

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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.