Home / 103,189.07-154,783.64-68,120.53

Finding the Fourth Proportional to 103,189.07, 154,783.64 and 68,120.53

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Solution

The fourth proportional to 103,189.07, 154,783.64 and 68,120.53 is: 102,180.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,189.07 : 154,783.64 = 68,120.53 : x
  2. Step 2: Convert to fraction form
    103,189.07/154,783.64 = 68,120.53/x
  3. Step 3: Cross multiply
    103,189.07x = 154,783.64 × 68,120.53
  4. Step 4: Simplify right side
    103,189.07x = 10,543,943,375.47
  5. Step 5: Solve for x
    x = 10,543,943,375.47/103,189.07
  6. Step 6: Final answer
    x = 102,180.81

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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.