Home / 143,406.81-197,906.21-78,878.78

Finding the Fourth Proportional to 143,406.81, 197,906.21 and 78,878.78

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Solution

The fourth proportional to 143,406.81, 197,906.21 and 78,878.78 is: 108,855.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,406.81 : 197,906.21 = 78,878.78 : x
  2. Step 2: Convert to fraction form
    143,406.81/197,906.21 = 78,878.78/x
  3. Step 3: Cross multiply
    143,406.81x = 197,906.21 × 78,878.78
  4. Step 4: Simplify right side
    143,406.81x = 15,610,599,015.30
  5. Step 5: Solve for x
    x = 15,610,599,015.30/143,406.81
  6. Step 6: Final answer
    x = 108,855.35

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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.