Home / 143,435.20-197,945.36-78,907.12

Finding the Fourth Proportional to 143,435.20, 197,945.36 and 78,907.12

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Solution

The fourth proportional to 143,435.20, 197,945.36 and 78,907.12 is: 108,894.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,435.20 : 197,945.36 = 78,907.12 : x
  2. Step 2: Convert to fraction form
    143,435.20/197,945.36 = 78,907.12/x
  3. Step 3: Cross multiply
    143,435.20x = 197,945.36 × 78,907.12
  4. Step 4: Simplify right side
    143,435.20x = 15,619,298,274.96
  5. Step 5: Solve for x
    x = 15,619,298,274.96/143,435.20
  6. Step 6: Final answer
    x = 108,894.46

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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.