Home / 142,638.14-196,846.78-78,975.94

Finding the Fourth Proportional to 142,638.14, 196,846.78 and 78,975.94

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Solution

The fourth proportional to 142,638.14, 196,846.78 and 78,975.94 is: 108,990.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,638.14 : 196,846.78 = 78,975.94 : x
  2. Step 2: Convert to fraction form
    142,638.14/196,846.78 = 78,975.94/x
  3. Step 3: Cross multiply
    142,638.14x = 196,846.78 × 78,975.94
  4. Step 4: Simplify right side
    142,638.14x = 15,546,158,107.36
  5. Step 5: Solve for x
    x = 15,546,158,107.36/142,638.14
  6. Step 6: Final answer
    x = 108,990.19

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1.5x scale

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.