Home / 142,639.21-196,842.44-78,112.67

Finding the Fourth Proportional to 142,639.21, 196,842.44 and 78,112.67

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Solution

The fourth proportional to 142,639.21, 196,842.44 and 78,112.67 is: 107,795.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,639.21 : 196,842.44 = 78,112.67 : x
  2. Step 2: Convert to fraction form
    142,639.21/196,842.44 = 78,112.67/x
  3. Step 3: Cross multiply
    142,639.21x = 196,842.44 × 78,112.67
  4. Step 4: Simplify right side
    142,639.21x = 15,375,889,181.39
  5. Step 5: Solve for x
    x = 15,375,889,181.39/142,639.21
  6. Step 6: Final answer
    x = 107,795.67

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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.