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Finding the Fourth Proportional to 45,079.20, 67,618.80 and 18,802.80

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Solution

The fourth proportional to 45,079.20, 67,618.80 and 18,802.80 is: 28,204.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,079.20 : 67,618.80 = 18,802.80 : x
  2. Step 2: Convert to fraction form
    45,079.20/67,618.80 = 18,802.80/x
  3. Step 3: Cross multiply
    45,079.20x = 67,618.80 × 18,802.80
  4. Step 4: Simplify right side
    45,079.20x = 1,271,422,772.64
  5. Step 5: Solve for x
    x = 1,271,422,772.64/45,079.20
  6. Step 6: Final answer
    x = 28,204.20

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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.