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Finding the Fourth Proportional to 381,722.72, 572,510.21 and 115,420.82

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Solution

The fourth proportional to 381,722.72, 572,510.21 and 115,420.82 is: 173,108.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,722.72 : 572,510.21 = 115,420.82 : x
  2. Step 2: Convert to fraction form
    381,722.72/572,510.21 = 115,420.82/x
  3. Step 3: Cross multiply
    381,722.72x = 572,510.21 × 115,420.82
  4. Step 4: Simplify right side
    381,722.72x = 66,079,594,456.92
  5. Step 5: Solve for x
    x = 66,079,594,456.92/381,722.72
  6. Step 6: Final answer
    x = 173,108.89

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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.