Home / 154,629.81-213,389.78-90,137.27

Finding the Fourth Proportional to 154,629.81, 213,389.78 and 90,137.27

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Solution

The fourth proportional to 154,629.81, 213,389.78 and 90,137.27 is: 124,389.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,629.81 : 213,389.78 = 90,137.27 : x
  2. Step 2: Convert to fraction form
    154,629.81/213,389.78 = 90,137.27/x
  3. Step 3: Cross multiply
    154,629.81x = 213,389.78 × 90,137.27
  4. Step 4: Simplify right side
    154,629.81x = 19,234,372,297.89
  5. Step 5: Solve for x
    x = 19,234,372,297.89/154,629.81
  6. Step 6: Final answer
    x = 124,389.81

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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.