Home / 143,407.17-197,906.73-78,879.12

Finding the Fourth Proportional to 143,407.17, 197,906.73 and 78,879.12

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Solution

The fourth proportional to 143,407.17, 197,906.73 and 78,879.12 is: 108,855.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,407.17 : 197,906.73 = 78,879.12 : x
  2. Step 2: Convert to fraction form
    143,407.17/197,906.73 = 78,879.12/x
  3. Step 3: Cross multiply
    143,407.17x = 197,906.73 × 78,879.12
  4. Step 4: Simplify right side
    143,407.17x = 15,610,708,704.48
  5. Step 5: Solve for x
    x = 15,610,708,704.48/143,407.17
  6. Step 6: Final answer
    x = 108,855.85

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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.