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Finding the Fourth Proportional to 172,321.94, 237,816.34 and 100,709.84

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Solution

The fourth proportional to 172,321.94, 237,816.34 and 100,709.84 is: 138,986.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,321.94 : 237,816.34 = 100,709.84 : x
  2. Step 2: Convert to fraction form
    172,321.94/237,816.34 = 100,709.84/x
  3. Step 3: Cross multiply
    172,321.94x = 237,816.34 × 100,709.84
  4. Step 4: Simplify right side
    172,321.94x = 23,950,445,550.79
  5. Step 5: Solve for x
    x = 23,950,445,550.79/172,321.94
  6. Step 6: Final answer
    x = 138,986.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.