Home / 143,266.80-197,709.06-78,735.36

Finding the Fourth Proportional to 143,266.80, 197,709.06 and 78,735.36

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Solution

The fourth proportional to 143,266.80, 197,709.06 and 78,735.36 is: 108,655.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,266.80 : 197,709.06 = 78,735.36 : x
  2. Step 2: Convert to fraction form
    143,266.80/197,709.06 = 78,735.36/x
  3. Step 3: Cross multiply
    143,266.80x = 197,709.06 × 78,735.36
  4. Step 4: Simplify right side
    143,266.80x = 15,566,694,014.36
  5. Step 5: Solve for x
    x = 15,566,694,014.36/143,266.80
  6. Step 6: Final answer
    x = 108,655.28

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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.