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Finding the Fourth Proportional to 74,080.64, 111,108 and 21,497.60

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Solution

The fourth proportional to 74,080.64, 111,108 and 21,497.60 is: 32,242.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,080.64 : 111,108 = 21,497.60 : x
  2. Step 2: Convert to fraction form
    74,080.64/111,108 = 21,497.60/x
  3. Step 3: Cross multiply
    74,080.64x = 111,108 × 21,497.60
  4. Step 4: Simplify right side
    74,080.64x = 2,388,555,340.80
  5. Step 5: Solve for x
    x = 2,388,555,340.80/74,080.64
  6. Step 6: Final answer
    x = 32,242.64

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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.