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Finding the Fourth Proportional to 67,880.80, 101,821.20 and 18,632.80

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Solution

The fourth proportional to 67,880.80, 101,821.20 and 18,632.80 is: 27,949.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,880.80 : 101,821.20 = 18,632.80 : x
  2. Step 2: Convert to fraction form
    67,880.80/101,821.20 = 18,632.80/x
  3. Step 3: Cross multiply
    67,880.80x = 101,821.20 × 18,632.80
  4. Step 4: Simplify right side
    67,880.80x = 1,897,214,055.36
  5. Step 5: Solve for x
    x = 1,897,214,055.36/67,880.80
  6. Step 6: Final answer
    x = 27,949.20

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Similar ratio
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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.