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Finding the Fourth Proportional to 72,486.96, 108,627.56 and 30,321.60

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Solution

The fourth proportional to 72,486.96, 108,627.56 and 30,321.60 is: 45,439.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,486.96 : 108,627.56 = 30,321.60 : x
  2. Step 2: Convert to fraction form
    72,486.96/108,627.56 = 30,321.60/x
  3. Step 3: Cross multiply
    72,486.96x = 108,627.56 × 30,321.60
  4. Step 4: Simplify right side
    72,486.96x = 3,293,761,423.30
  5. Step 5: Solve for x
    x = 3,293,761,423.30/72,486.96
  6. Step 6: Final answer
    x = 45,439.36

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1.5x scale

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.