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Finding the Fourth Proportional to 258,137.80, 356,234.70 and 143,426.96

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Solution

The fourth proportional to 258,137.80, 356,234.70 and 143,426.96 is: 197,931.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,137.80 : 356,234.70 = 143,426.96 : x
  2. Step 2: Convert to fraction form
    258,137.80/356,234.70 = 143,426.96/x
  3. Step 3: Cross multiply
    258,137.80x = 356,234.70 × 143,426.96
  4. Step 4: Simplify right side
    258,137.80x = 51,093,660,067.51
  5. Step 5: Solve for x
    x = 51,093,660,067.51/258,137.80
  6. Step 6: Final answer
    x = 197,931.73

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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.