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Finding the Fourth Proportional to 48,608.64, 72,861.12 and 20,522.88

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Solution

The fourth proportional to 48,608.64, 72,861.12 and 20,522.88 is: 30,762.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,608.64 : 72,861.12 = 20,522.88 : x
  2. Step 2: Convert to fraction form
    48,608.64/72,861.12 = 20,522.88/x
  3. Step 3: Cross multiply
    48,608.64x = 72,861.12 × 20,522.88
  4. Step 4: Simplify right side
    48,608.64x = 1,495,320,022.43
  5. Step 5: Solve for x
    x = 1,495,320,022.43/48,608.64
  6. Step 6: Final answer
    x = 30,762.43

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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.