Home / 257,688.07-386,556.70-80,147.41

Finding the Fourth Proportional to 257,688.07, 386,556.70 and 80,147.41

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Solution

The fourth proportional to 257,688.07, 386,556.70 and 80,147.41 is: 120,228.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,688.07 : 386,556.70 = 80,147.41 : x
  2. Step 2: Convert to fraction form
    257,688.07/386,556.70 = 80,147.41/x
  3. Step 3: Cross multiply
    257,688.07x = 386,556.70 × 80,147.41
  4. Step 4: Simplify right side
    257,688.07x = 30,981,518,323.15
  5. Step 5: Solve for x
    x = 30,981,518,323.15/257,688.07
  6. Step 6: Final answer
    x = 120,228.76

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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.