Home / 381,431.52-571,918.77-128,706.39

Finding the Fourth Proportional to 381,431.52, 571,918.77 and 128,706.39

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Solution

The fourth proportional to 381,431.52, 571,918.77 and 128,706.39 is: 192,982.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,431.52 : 571,918.77 = 128,706.39 : x
  2. Step 2: Convert to fraction form
    381,431.52/571,918.77 = 128,706.39/x
  3. Step 3: Cross multiply
    381,431.52x = 571,918.77 × 128,706.39
  4. Step 4: Simplify right side
    381,431.52x = 73,609,600,259.94
  5. Step 5: Solve for x
    x = 73,609,600,259.94/381,431.52
  6. Step 6: Final answer
    x = 192,982.48

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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.