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Finding the Fourth Proportional to 45,331.66, 67,979.03 and 20,365

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Solution

The fourth proportional to 45,331.66, 67,979.03 and 20,365 is: 30,539.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,331.66 : 67,979.03 = 20,365 : x
  2. Step 2: Convert to fraction form
    45,331.66/67,979.03 = 20,365/x
  3. Step 3: Cross multiply
    45,331.66x = 67,979.03 × 20,365
  4. Step 4: Simplify right side
    45,331.66x = 1,384,392,945.95
  5. Step 5: Solve for x
    x = 1,384,392,945.95/45,331.66
  6. Step 6: Final answer
    x = 30,539.21

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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.