Home / 131,628.21-181,646.22-71,198.67

Finding the Fourth Proportional to 131,628.21, 181,646.22 and 71,198.67

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Solution

The fourth proportional to 131,628.21, 181,646.22 and 71,198.67 is: 98,253.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,628.21 : 181,646.22 = 71,198.67 : x
  2. Step 2: Convert to fraction form
    131,628.21/181,646.22 = 71,198.67/x
  3. Step 3: Cross multiply
    131,628.21x = 181,646.22 × 71,198.67
  4. Step 4: Simplify right side
    131,628.21x = 12,932,969,274.53
  5. Step 5: Solve for x
    x = 12,932,969,274.53/131,628.21
  6. Step 6: Final answer
    x = 98,253.78

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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.