Home / 142,639.63-196,848.84-78,977.43

Finding the Fourth Proportional to 142,639.63, 196,848.84 and 78,977.43

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Solution

The fourth proportional to 142,639.63, 196,848.84 and 78,977.43 is: 108,992.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,639.63 : 196,848.84 = 78,977.43 : x
  2. Step 2: Convert to fraction form
    142,639.63/196,848.84 = 78,977.43/x
  3. Step 3: Cross multiply
    142,639.63x = 196,848.84 × 78,977.43
  4. Step 4: Simplify right side
    142,639.63x = 15,546,615,481.68
  5. Step 5: Solve for x
    x = 15,546,615,481.68/142,639.63
  6. Step 6: Final answer
    x = 108,992.26

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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.