Home / 142,639.14-196,844.43-78,107.34

Finding the Fourth Proportional to 142,639.14, 196,844.43 and 78,107.34

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Solution

The fourth proportional to 142,639.14, 196,844.43 and 78,107.34 is: 107,789.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,639.14 : 196,844.43 = 78,107.34 : x
  2. Step 2: Convert to fraction form
    142,639.14/196,844.43 = 78,107.34/x
  3. Step 3: Cross multiply
    142,639.14x = 196,844.43 × 78,107.34
  4. Step 4: Simplify right side
    142,639.14x = 15,374,994,821.12
  5. Step 5: Solve for x
    x = 15,374,994,821.12/142,639.14
  6. Step 6: Final answer
    x = 107,789.45

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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.