Home / 72,790.20-109,120.34-28,406.64

Finding the Fourth Proportional to 72,790.20, 109,120.34 and 28,406.64

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Solution

The fourth proportional to 72,790.20, 109,120.34 and 28,406.64 is: 42,584.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,790.20 : 109,120.34 = 28,406.64 : x
  2. Step 2: Convert to fraction form
    72,790.20/109,120.34 = 28,406.64/x
  3. Step 3: Cross multiply
    72,790.20x = 109,120.34 × 28,406.64
  4. Step 4: Simplify right side
    72,790.20x = 3,099,742,215.06
  5. Step 5: Solve for x
    x = 3,099,742,215.06/72,790.20
  6. Step 6: Final answer
    x = 42,584.61

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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.