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Finding the Fourth Proportional to 40,078.80, 60,118.20 and 28,414.80

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Solution

The fourth proportional to 40,078.80, 60,118.20 and 28,414.80 is: 42,622.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,078.80 : 60,118.20 = 28,414.80 : x
  2. Step 2: Convert to fraction form
    40,078.80/60,118.20 = 28,414.80/x
  3. Step 3: Cross multiply
    40,078.80x = 60,118.20 × 28,414.80
  4. Step 4: Simplify right side
    40,078.80x = 1,708,246,629.36
  5. Step 5: Solve for x
    x = 1,708,246,629.36/40,078.80
  6. Step 6: Final answer
    x = 42,622.20

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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.