Home / 142,635.75-196,840.35-78,107.72

Finding the Fourth Proportional to 142,635.75, 196,840.35 and 78,107.72

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Solution

The fourth proportional to 142,635.75, 196,840.35 and 78,107.72 is: 107,790.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,635.75 : 196,840.35 = 78,107.72 : x
  2. Step 2: Convert to fraction form
    142,635.75/196,840.35 = 78,107.72/x
  3. Step 3: Cross multiply
    142,635.75x = 196,840.35 × 78,107.72
  4. Step 4: Simplify right side
    142,635.75x = 15,374,749,958.30
  5. Step 5: Solve for x
    x = 15,374,749,958.30/142,635.75
  6. Step 6: Final answer
    x = 107,790.30

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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.