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Finding the Fourth Proportional to 84,116.39, 126,174.35 and 20,935.33

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Solution

The fourth proportional to 84,116.39, 126,174.35 and 20,935.33 is: 31,402.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,116.39 : 126,174.35 = 20,935.33 : x
  2. Step 2: Convert to fraction form
    84,116.39/126,174.35 = 20,935.33/x
  3. Step 3: Cross multiply
    84,116.39x = 126,174.35 × 20,935.33
  4. Step 4: Simplify right side
    84,116.39x = 2,641,501,391.69
  5. Step 5: Solve for x
    x = 2,641,501,391.69/84,116.39
  6. Step 6: Final answer
    x = 31,402.94

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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.