Home / 225,415.12-311,002.32-129,908.76

Finding the Fourth Proportional to 225,415.12, 311,002.32 and 129,908.76

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Solution

The fourth proportional to 225,415.12, 311,002.32 and 129,908.76 is: 179,233.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,415.12 : 311,002.32 = 129,908.76 : x
  2. Step 2: Convert to fraction form
    225,415.12/311,002.32 = 129,908.76/x
  3. Step 3: Cross multiply
    225,415.12x = 311,002.32 × 129,908.76
  4. Step 4: Simplify right side
    225,415.12x = 40,401,925,748.32
  5. Step 5: Solve for x
    x = 40,401,925,748.32/225,415.12
  6. Step 6: Final answer
    x = 179,233.43

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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.