Home / 260,743.80-390,957.30-102,790.20

Finding the Fourth Proportional to 260,743.80, 390,957.30 and 102,790.20

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Solution

The fourth proportional to 260,743.80, 390,957.30 and 102,790.20 is: 154,122.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,743.80 : 390,957.30 = 102,790.20 : x
  2. Step 2: Convert to fraction form
    260,743.80/390,957.30 = 102,790.20/x
  3. Step 3: Cross multiply
    260,743.80x = 390,957.30 × 102,790.20
  4. Step 4: Simplify right side
    260,743.80x = 40,186,579,058.46
  5. Step 5: Solve for x
    x = 40,186,579,058.46/260,743.80
  6. Step 6: Final answer
    x = 154,122.86

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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.