Home / 143,351.98-197,813.58-78,817.76

Finding the Fourth Proportional to 143,351.98, 197,813.58 and 78,817.76

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Solution

The fourth proportional to 143,351.98, 197,813.58 and 78,817.76 is: 108,761.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,351.98 : 197,813.58 = 78,817.76 : x
  2. Step 2: Convert to fraction form
    143,351.98/197,813.58 = 78,817.76/x
  3. Step 3: Cross multiply
    143,351.98x = 197,813.58 × 78,817.76
  4. Step 4: Simplify right side
    143,351.98x = 15,591,223,273.18
  5. Step 5: Solve for x
    x = 15,591,223,273.18/143,351.98
  6. Step 6: Final answer
    x = 108,761.83

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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.