Home / 381,012.20-571,118.22-128,204.93

Finding the Fourth Proportional to 381,012.20, 571,118.22 and 128,204.93

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Solution

The fourth proportional to 381,012.20, 571,118.22 and 128,204.93 is: 192,172.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,012.20 : 571,118.22 = 128,204.93 : x
  2. Step 2: Convert to fraction form
    381,012.20/571,118.22 = 128,204.93/x
  3. Step 3: Cross multiply
    381,012.20x = 571,118.22 × 128,204.93
  4. Step 4: Simplify right side
    381,012.20x = 73,220,171,416.82
  5. Step 5: Solve for x
    x = 73,220,171,416.82/381,012.20
  6. Step 6: Final answer
    x = 192,172.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.