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Finding the Fourth Proportional to 220,382.20, 330,621.90 and 70,629.40

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Solution

The fourth proportional to 220,382.20, 330,621.90 and 70,629.40 is: 105,959.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,382.20 : 330,621.90 = 70,629.40 : x
  2. Step 2: Convert to fraction form
    220,382.20/330,621.90 = 70,629.40/x
  3. Step 3: Cross multiply
    220,382.20x = 330,621.90 × 70,629.40
  4. Step 4: Simplify right side
    220,382.20x = 23,351,626,423.86
  5. Step 5: Solve for x
    x = 23,351,626,423.86/220,382.20
  6. Step 6: Final answer
    x = 105,959.68

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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.