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Finding the Fourth Proportional to 258,145.92, 356,245.80 and 143,434.92

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Solution

The fourth proportional to 258,145.92, 356,245.80 and 143,434.92 is: 197,942.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,145.92 : 356,245.80 = 143,434.92 : x
  2. Step 2: Convert to fraction form
    258,145.92/356,245.80 = 143,434.92/x
  3. Step 3: Cross multiply
    258,145.92x = 356,245.80 × 143,434.92
  4. Step 4: Simplify right side
    258,145.92x = 51,098,087,823.34
  5. Step 5: Solve for x
    x = 51,098,087,823.34/258,145.92
  6. Step 6: Final answer
    x = 197,942.65

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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.