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Finding the Fourth Proportional to 45,579, 68,348.36 and 20,618.04

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Solution

The fourth proportional to 45,579, 68,348.36 and 20,618.04 is: 30,917.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,579 : 68,348.36 = 20,618.04 : x
  2. Step 2: Convert to fraction form
    45,579/68,348.36 = 20,618.04/x
  3. Step 3: Cross multiply
    45,579x = 68,348.36 × 20,618.04
  4. Step 4: Simplify right side
    45,579x = 1,409,209,220.41
  5. Step 5: Solve for x
    x = 1,409,209,220.41/45,579
  6. Step 6: Final answer
    x = 30,917.95

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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.