Home / 142,149.63-196,164.14-78,485.79

Finding the Fourth Proportional to 142,149.63, 196,164.14 and 78,485.79

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Solution

The fourth proportional to 142,149.63, 196,164.14 and 78,485.79 is: 108,309.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,149.63 : 196,164.14 = 78,485.79 : x
  2. Step 2: Convert to fraction form
    142,149.63/196,164.14 = 78,485.79/x
  3. Step 3: Cross multiply
    142,149.63x = 196,164.14 × 78,485.79
  4. Step 4: Simplify right side
    142,149.63x = 15,396,097,105.14
  5. Step 5: Solve for x
    x = 15,396,097,105.14/142,149.63
  6. Step 6: Final answer
    x = 108,309.09

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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.