Home / 143,313.67-197,775.38-78,785.63

Finding the Fourth Proportional to 143,313.67, 197,775.38 and 78,785.63

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Solution

The fourth proportional to 143,313.67, 197,775.38 and 78,785.63 is: 108,725.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,313.67 : 197,775.38 = 78,785.63 : x
  2. Step 2: Convert to fraction form
    143,313.67/197,775.38 = 78,785.63/x
  3. Step 3: Cross multiply
    143,313.67x = 197,775.38 × 78,785.63
  4. Step 4: Simplify right side
    143,313.67x = 15,581,856,528.98
  5. Step 5: Solve for x
    x = 15,581,856,528.98/143,313.67
  6. Step 6: Final answer
    x = 108,725.54

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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.