Home / 260,733.80-390,942.30-102,780.20

Finding the Fourth Proportional to 260,733.80, 390,942.30 and 102,780.20

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Solution

The fourth proportional to 260,733.80, 390,942.30 and 102,780.20 is: 154,107.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,733.80 : 390,942.30 = 102,780.20 : x
  2. Step 2: Convert to fraction form
    260,733.80/390,942.30 = 102,780.20/x
  3. Step 3: Cross multiply
    260,733.80x = 390,942.30 × 102,780.20
  4. Step 4: Simplify right side
    260,733.80x = 40,181,127,782.46
  5. Step 5: Solve for x
    x = 40,181,127,782.46/260,733.80
  6. Step 6: Final answer
    x = 154,107.86

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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.