Home / 143,211.00-197,631.29-78,684.39

Finding the Fourth Proportional to 143,211.00, 197,631.29 and 78,684.39

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Solution

The fourth proportional to 143,211.00, 197,631.29 and 78,684.39 is: 108,584.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,211.00 : 197,631.29 = 78,684.39 : x
  2. Step 2: Convert to fraction form
    143,211.00/197,631.29 = 78,684.39/x
  3. Step 3: Cross multiply
    143,211.00x = 197,631.29 × 78,684.39
  4. Step 4: Simplify right side
    143,211.00x = 15,550,498,172.96
  5. Step 5: Solve for x
    x = 15,550,498,172.96/143,211.00
  6. Step 6: Final answer
    x = 108,584.53

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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.