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Finding the Fourth Proportional to 72,487.96, 108,629.06 and 30,322.60

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Solution

The fourth proportional to 72,487.96, 108,629.06 and 30,322.60 is: 45,440.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,487.96 : 108,629.06 = 30,322.60 : x
  2. Step 2: Convert to fraction form
    72,487.96/108,629.06 = 30,322.60/x
  3. Step 3: Cross multiply
    72,487.96x = 108,629.06 × 30,322.60
  4. Step 4: Simplify right side
    72,487.96x = 3,293,915,534.76
  5. Step 5: Solve for x
    x = 3,293,915,534.76/72,487.96
  6. Step 6: Final answer
    x = 45,440.86

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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.