Home / 260,731.80-390,939.30-102,778.20

Finding the Fourth Proportional to 260,731.80, 390,939.30 and 102,778.20

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Solution

The fourth proportional to 260,731.80, 390,939.30 and 102,778.20 is: 154,104.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,731.80 : 390,939.30 = 102,778.20 : x
  2. Step 2: Convert to fraction form
    260,731.80/390,939.30 = 102,778.20/x
  3. Step 3: Cross multiply
    260,731.80x = 390,939.30 × 102,778.20
  4. Step 4: Simplify right side
    260,731.80x = 40,180,037,563.26
  5. Step 5: Solve for x
    x = 40,180,037,563.26/260,731.80
  6. Step 6: Final answer
    x = 154,104.86

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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.