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Finding the Fourth Proportional to 321,109.21, 443,130.69 and 177,878.53

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Solution

The fourth proportional to 321,109.21, 443,130.69 and 177,878.53 is: 245,472.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,109.21 : 443,130.69 = 177,878.53 : x
  2. Step 2: Convert to fraction form
    321,109.21/443,130.69 = 177,878.53/x
  3. Step 3: Cross multiply
    321,109.21x = 443,130.69 × 177,878.53
  4. Step 4: Simplify right side
    321,109.21x = 78,823,435,735.09
  5. Step 5: Solve for x
    x = 78,823,435,735.09/321,109.21
  6. Step 6: Final answer
    x = 245,472.36

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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.