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Finding the Fourth Proportional to 45,328.80, 68,007.60 and 20,359.20

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Solution

The fourth proportional to 45,328.80, 68,007.60 and 20,359.20 is: 30,545.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,328.80 : 68,007.60 = 20,359.20 : x
  2. Step 2: Convert to fraction form
    45,328.80/68,007.60 = 20,359.20/x
  3. Step 3: Cross multiply
    45,328.80x = 68,007.60 × 20,359.20
  4. Step 4: Simplify right side
    45,328.80x = 1,384,580,329.92
  5. Step 5: Solve for x
    x = 1,384,580,329.92/45,328.80
  6. Step 6: Final answer
    x = 30,545.27

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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.