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Finding the Fourth Proportional to 72,209.88, 107,835.03 and 71,427.96

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Solution

The fourth proportional to 72,209.88, 107,835.03 and 71,427.96 is: 106,667.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,209.88 : 107,835.03 = 71,427.96 : x
  2. Step 2: Convert to fraction form
    72,209.88/107,835.03 = 71,427.96/x
  3. Step 3: Cross multiply
    72,209.88x = 107,835.03 × 71,427.96
  4. Step 4: Simplify right side
    72,209.88x = 7,702,436,209.44
  5. Step 5: Solve for x
    x = 7,702,436,209.44/72,209.88
  6. Step 6: Final answer
    x = 106,667.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.