Home / 72,420.20-108,630.30-30,861.80

Finding the Fourth Proportional to 72,420.20, 108,630.30 and 30,861.80

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Solution

The fourth proportional to 72,420.20, 108,630.30 and 30,861.80 is: 46,292.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,420.20 : 108,630.30 = 30,861.80 : x
  2. Step 2: Convert to fraction form
    72,420.20/108,630.30 = 30,861.80/x
  3. Step 3: Cross multiply
    72,420.20x = 108,630.30 × 30,861.80
  4. Step 4: Simplify right side
    72,420.20x = 3,352,526,592.54
  5. Step 5: Solve for x
    x = 3,352,526,592.54/72,420.20
  6. Step 6: Final answer
    x = 46,292.70

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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.