Home / 260,739.80-390,951.30-102,786.20

Finding the Fourth Proportional to 260,739.80, 390,951.30 and 102,786.20

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Solution

The fourth proportional to 260,739.80, 390,951.30 and 102,786.20 is: 154,116.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,739.80 : 390,951.30 = 102,786.20 : x
  2. Step 2: Convert to fraction form
    260,739.80/390,951.30 = 102,786.20/x
  3. Step 3: Cross multiply
    260,739.80x = 390,951.30 × 102,786.20
  4. Step 4: Simplify right side
    260,739.80x = 40,184,398,512.06
  5. Step 5: Solve for x
    x = 40,184,398,512.06/260,739.80
  6. Step 6: Final answer
    x = 154,116.86

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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.