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Finding the Fourth Proportional to 45,384, 68,034.50 and 19,090.60

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Solution

The fourth proportional to 45,384, 68,034.50 and 19,090.60 is: 28,618.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,384 : 68,034.50 = 19,090.60 : x
  2. Step 2: Convert to fraction form
    45,384/68,034.50 = 19,090.60/x
  3. Step 3: Cross multiply
    45,384x = 68,034.50 × 19,090.60
  4. Step 4: Simplify right side
    45,384x = 1,298,819,425.70
  5. Step 5: Solve for x
    x = 1,298,819,425.70/45,384
  6. Step 6: Final answer
    x = 28,618.44

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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.