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Finding the Fourth Proportional to 66,760.76, 100,138.52 and 16,840.20

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Solution

The fourth proportional to 66,760.76, 100,138.52 and 16,840.20 is: 25,259.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,760.76 : 100,138.52 = 16,840.20 : x
  2. Step 2: Convert to fraction form
    66,760.76/100,138.52 = 16,840.20/x
  3. Step 3: Cross multiply
    66,760.76x = 100,138.52 × 16,840.20
  4. Step 4: Simplify right side
    66,760.76x = 1,686,352,704.50
  5. Step 5: Solve for x
    x = 1,686,352,704.50/66,760.76
  6. Step 6: Final answer
    x = 25,259.64

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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.