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Finding the Fourth Proportional to 36,178.74, 49,929.74 and 21,072.78

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Solution

The fourth proportional to 36,178.74, 49,929.74 and 21,072.78 is: 29,082.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,178.74 : 49,929.74 = 21,072.78 : x
  2. Step 2: Convert to fraction form
    36,178.74/49,929.74 = 21,072.78/x
  3. Step 3: Cross multiply
    36,178.74x = 49,929.74 × 21,072.78
  4. Step 4: Simplify right side
    36,178.74x = 1,052,158,321.11
  5. Step 5: Solve for x
    x = 1,052,158,321.11/36,178.74
  6. Step 6: Final answer
    x = 29,082.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.