Home / 381,236.13-571,688.09-128,469.51

Finding the Fourth Proportional to 381,236.13, 571,688.09 and 128,469.51

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Solution

The fourth proportional to 381,236.13, 571,688.09 and 128,469.51 is: 192,648.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,236.13 : 571,688.09 = 128,469.51 : x
  2. Step 2: Convert to fraction form
    381,236.13/571,688.09 = 128,469.51/x
  3. Step 3: Cross multiply
    381,236.13x = 571,688.09 × 128,469.51
  4. Step 4: Simplify right side
    381,236.13x = 73,444,488,152.79
  5. Step 5: Solve for x
    x = 73,444,488,152.79/381,236.13
  6. Step 6: Final answer
    x = 192,648.29

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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.