Home / 72,631.20-108,946.80-20,040.60

Finding the Fourth Proportional to 72,631.20, 108,946.80 and 20,040.60

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Solution

The fourth proportional to 72,631.20, 108,946.80 and 20,040.60 is: 30,060.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,631.20 : 108,946.80 = 20,040.60 : x
  2. Step 2: Convert to fraction form
    72,631.20/108,946.80 = 20,040.60/x
  3. Step 3: Cross multiply
    72,631.20x = 108,946.80 × 20,040.60
  4. Step 4: Simplify right side
    72,631.20x = 2,183,359,240.08
  5. Step 5: Solve for x
    x = 2,183,359,240.08/72,631.20
  6. Step 6: Final answer
    x = 30,060.90

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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.