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Finding the Fourth Proportional to 84,008.70, 125,969.30 and 39,623.54

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Solution

The fourth proportional to 84,008.70, 125,969.30 and 39,623.54 is: 59,414.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,008.70 : 125,969.30 = 39,623.54 : x
  2. Step 2: Convert to fraction form
    84,008.70/125,969.30 = 39,623.54/x
  3. Step 3: Cross multiply
    84,008.70x = 125,969.30 × 39,623.54
  4. Step 4: Simplify right side
    84,008.70x = 4,991,348,769.36
  5. Step 5: Solve for x
    x = 4,991,348,769.36/84,008.70
  6. Step 6: Final answer
    x = 59,414.67

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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.