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Finding the Fourth Proportional to 61,629.20, 92,443.80 and 20,080.40

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Solution

The fourth proportional to 61,629.20, 92,443.80 and 20,080.40 is: 30,120.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,629.20 : 92,443.80 = 20,080.40 : x
  2. Step 2: Convert to fraction form
    61,629.20/92,443.80 = 20,080.40/x
  3. Step 3: Cross multiply
    61,629.20x = 92,443.80 × 20,080.40
  4. Step 4: Simplify right side
    61,629.20x = 1,856,308,481.52
  5. Step 5: Solve for x
    x = 1,856,308,481.52/61,629.20
  6. Step 6: Final answer
    x = 30,120.60

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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.