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Finding the Fourth Proportional to 72,518.97, 108,811.09 and 39,200.03

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Solution

The fourth proportional to 72,518.97, 108,811.09 and 39,200.03 is: 58,817.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,518.97 : 108,811.09 = 39,200.03 : x
  2. Step 2: Convert to fraction form
    72,518.97/108,811.09 = 39,200.03/x
  3. Step 3: Cross multiply
    72,518.97x = 108,811.09 × 39,200.03
  4. Step 4: Simplify right side
    72,518.97x = 4,265,397,905.32
  5. Step 5: Solve for x
    x = 4,265,397,905.32/72,518.97
  6. Step 6: Final answer
    x = 58,817.68

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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.