Home / 257,689.07-386,558.20-80,148.41

Finding the Fourth Proportional to 257,689.07, 386,558.20 and 80,148.41

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Solution

The fourth proportional to 257,689.07, 386,558.20 and 80,148.41 is: 120,230.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,689.07 : 386,558.20 = 80,148.41 : x
  2. Step 2: Convert to fraction form
    257,689.07/386,558.20 = 80,148.41/x
  3. Step 3: Cross multiply
    257,689.07x = 386,558.20 × 80,148.41
  4. Step 4: Simplify right side
    257,689.07x = 30,982,025,102.46
  5. Step 5: Solve for x
    x = 30,982,025,102.46/257,689.07
  6. Step 6: Final answer
    x = 120,230.26

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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.