Home / 68,112.38-102,172.41-20,729.00

Finding the Fourth Proportional to 68,112.38, 102,172.41 and 20,729.00

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Solution

The fourth proportional to 68,112.38, 102,172.41 and 20,729.00 is: 31,094.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,112.38 : 102,172.41 = 20,729.00 : x
  2. Step 2: Convert to fraction form
    68,112.38/102,172.41 = 20,729.00/x
  3. Step 3: Cross multiply
    68,112.38x = 102,172.41 × 20,729.00
  4. Step 4: Simplify right side
    68,112.38x = 2,117,932,142.32
  5. Step 5: Solve for x
    x = 2,117,932,142.32/68,112.38
  6. Step 6: Final answer
    x = 31,094.67

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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.