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Finding the Fourth Proportional to 72,459.79, 108,708.21 and 22,540.32

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Solution

The fourth proportional to 72,459.79, 108,708.21 and 22,540.32 is: 33,816.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,459.79 : 108,708.21 = 22,540.32 : x
  2. Step 2: Convert to fraction form
    72,459.79/108,708.21 = 22,540.32/x
  3. Step 3: Cross multiply
    72,459.79x = 108,708.21 × 22,540.32
  4. Step 4: Simplify right side
    72,459.79x = 2,450,317,840.03
  5. Step 5: Solve for x
    x = 2,450,317,840.03/72,459.79
  6. Step 6: Final answer
    x = 33,816.24

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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.