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Finding the Fourth Proportional to 166,620.80, 249,736.80 and 66,731.60

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Solution

The fourth proportional to 166,620.80, 249,736.80 and 66,731.60 is: 100,019.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,620.80 : 249,736.80 = 66,731.60 : x
  2. Step 2: Convert to fraction form
    166,620.80/249,736.80 = 66,731.60/x
  3. Step 3: Cross multiply
    166,620.80x = 249,736.80 × 66,731.60
  4. Step 4: Simplify right side
    166,620.80x = 16,665,336,242.88
  5. Step 5: Solve for x
    x = 16,665,336,242.88/166,620.80
  6. Step 6: Final answer
    x = 100,019.54

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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.