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Finding the Fourth Proportional to 143,245.97, 197,682.74 and 78,719.22

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Solution

The fourth proportional to 143,245.97, 197,682.74 and 78,719.22 is: 108,634.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,245.97 : 197,682.74 = 78,719.22 : x
  2. Step 2: Convert to fraction form
    143,245.97/197,682.74 = 78,719.22/x
  3. Step 3: Cross multiply
    143,245.97x = 197,682.74 × 78,719.22
  4. Step 4: Simplify right side
    143,245.97x = 15,561,430,706.67
  5. Step 5: Solve for x
    x = 15,561,430,706.67/143,245.97
  6. Step 6: Final answer
    x = 108,634.34

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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.