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Finding the Fourth Proportional to 49,990.57, 74,967.02 and 20,392.56

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Solution

The fourth proportional to 49,990.57, 74,967.02 and 20,392.56 is: 30,581.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,990.57 : 74,967.02 = 20,392.56 : x
  2. Step 2: Convert to fraction form
    49,990.57/74,967.02 = 20,392.56/x
  3. Step 3: Cross multiply
    49,990.57x = 74,967.02 × 20,392.56
  4. Step 4: Simplify right side
    49,990.57x = 1,528,769,427.88
  5. Step 5: Solve for x
    x = 1,528,769,427.88/49,990.57
  6. Step 6: Final answer
    x = 30,581.16

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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.