Home / 315,625.18-435,556-172,385.78

Finding the Fourth Proportional to 315,625.18, 435,556 and 172,385.78

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Solution

The fourth proportional to 315,625.18, 435,556 and 172,385.78 is: 237,888.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,625.18 : 435,556 = 172,385.78 : x
  2. Step 2: Convert to fraction form
    315,625.18/435,556 = 172,385.78/x
  3. Step 3: Cross multiply
    315,625.18x = 435,556 × 172,385.78
  4. Step 4: Simplify right side
    315,625.18x = 75,083,660,793.68
  5. Step 5: Solve for x
    x = 75,083,660,793.68/315,625.18
  6. Step 6: Final answer
    x = 237,888.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.