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Finding the Fourth Proportional to 72,511.80, 108,621.90 and 48,892.20

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Solution

The fourth proportional to 72,511.80, 108,621.90 and 48,892.20 is: 73,239.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,511.80 : 108,621.90 = 48,892.20 : x
  2. Step 2: Convert to fraction form
    72,511.80/108,621.90 = 48,892.20/x
  3. Step 3: Cross multiply
    72,511.80x = 108,621.90 × 48,892.20
  4. Step 4: Simplify right side
    72,511.80x = 5,310,763,659.18
  5. Step 5: Solve for x
    x = 5,310,763,659.18/72,511.80
  6. Step 6: Final answer
    x = 73,239.99

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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.