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Finding the Fourth Proportional to 381,170.70, 571,808.79 and 128,523.51

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Solution

The fourth proportional to 381,170.70, 571,808.79 and 128,523.51 is: 192,803.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,170.70 : 571,808.79 = 128,523.51 : x
  2. Step 2: Convert to fraction form
    381,170.70/571,808.79 = 128,523.51/x
  3. Step 3: Cross multiply
    381,170.70x = 571,808.79 × 128,523.51
  4. Step 4: Simplify right side
    381,170.70x = 73,490,872,739.65
  5. Step 5: Solve for x
    x = 73,490,872,739.65/381,170.70
  6. Step 6: Final answer
    x = 192,803.05

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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.