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Finding the Fourth Proportional to 108,771.15, 150,257.12 and 83,939.79

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Solution

The fourth proportional to 108,771.15, 150,257.12 and 83,939.79 is: 115,954.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,771.15 : 150,257.12 = 83,939.79 : x
  2. Step 2: Convert to fraction form
    108,771.15/150,257.12 = 83,939.79/x
  3. Step 3: Cross multiply
    108,771.15x = 150,257.12 × 83,939.79
  4. Step 4: Simplify right side
    108,771.15x = 12,612,550,679.11
  5. Step 5: Solve for x
    x = 12,612,550,679.11/108,771.15
  6. Step 6: Final answer
    x = 115,954.93

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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.