Home / 257,871.21-355,856.67-143,143.22

Finding the Fourth Proportional to 257,871.21, 355,856.67 and 143,143.22

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Solution

The fourth proportional to 257,871.21, 355,856.67 and 143,143.22 is: 197,534.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,871.21 : 355,856.67 = 143,143.22 : x
  2. Step 2: Convert to fraction form
    257,871.21/355,856.67 = 143,143.22/x
  3. Step 3: Cross multiply
    257,871.21x = 355,856.67 × 143,143.22
  4. Step 4: Simplify right side
    257,871.21x = 50,938,469,602.28
  5. Step 5: Solve for x
    x = 50,938,469,602.28/257,871.21
  6. Step 6: Final answer
    x = 197,534.54

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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.