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Finding the Fourth Proportional to 225,315.76, 311,004.84 and 129,885.88

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Solution

The fourth proportional to 225,315.76, 311,004.84 and 129,885.88 is: 179,282.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,315.76 : 311,004.84 = 129,885.88 : x
  2. Step 2: Convert to fraction form
    225,315.76/311,004.84 = 129,885.88/x
  3. Step 3: Cross multiply
    225,315.76x = 311,004.84 × 129,885.88
  4. Step 4: Simplify right side
    225,315.76x = 40,395,137,327.66
  5. Step 5: Solve for x
    x = 40,395,137,327.66/225,315.76
  6. Step 6: Final answer
    x = 179,282.34

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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.