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Finding the Fourth Proportional to 40,206.80, 60,281.40 and 16,821.20

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Solution

The fourth proportional to 40,206.80, 60,281.40 and 16,821.20 is: 25,219.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,206.80 : 60,281.40 = 16,821.20 : x
  2. Step 2: Convert to fraction form
    40,206.80/60,281.40 = 16,821.20/x
  3. Step 3: Cross multiply
    40,206.80x = 60,281.40 × 16,821.20
  4. Step 4: Simplify right side
    40,206.80x = 1,014,005,485.68
  5. Step 5: Solve for x
    x = 1,014,005,485.68/40,206.80
  6. Step 6: Final answer
    x = 25,219.75

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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.