Home / 154,120.43-212,668.26-86,137.54

Finding the Fourth Proportional to 154,120.43, 212,668.26 and 86,137.54

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Solution

The fourth proportional to 154,120.43, 212,668.26 and 86,137.54 is: 118,859.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,120.43 : 212,668.26 = 86,137.54 : x
  2. Step 2: Convert to fraction form
    154,120.43/212,668.26 = 86,137.54/x
  3. Step 3: Cross multiply
    154,120.43x = 212,668.26 × 86,137.54
  4. Step 4: Simplify right side
    154,120.43x = 18,318,720,752.48
  5. Step 5: Solve for x
    x = 18,318,720,752.48/154,120.43
  6. Step 6: Final answer
    x = 118,859.78

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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.