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Finding the Fourth Proportional to 45,079.60, 67,619.40 and 20,455.60

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Solution

The fourth proportional to 45,079.60, 67,619.40 and 20,455.60 is: 30,683.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,079.60 : 67,619.40 = 20,455.60 : x
  2. Step 2: Convert to fraction form
    45,079.60/67,619.40 = 20,455.60/x
  3. Step 3: Cross multiply
    45,079.60x = 67,619.40 × 20,455.60
  4. Step 4: Simplify right side
    45,079.60x = 1,383,195,398.64
  5. Step 5: Solve for x
    x = 1,383,195,398.64/45,079.60
  6. Step 6: Final answer
    x = 30,683.40

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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.