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Finding the Fourth Proportional to 45,644.80, 68,467.20 and 40,979.20

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Solution

The fourth proportional to 45,644.80, 68,467.20 and 40,979.20 is: 61,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,644.80 : 68,467.20 = 40,979.20 : x
  2. Step 2: Convert to fraction form
    45,644.80/68,467.20 = 40,979.20/x
  3. Step 3: Cross multiply
    45,644.80x = 68,467.20 × 40,979.20
  4. Step 4: Simplify right side
    45,644.80x = 2,805,731,082.24
  5. Step 5: Solve for x
    x = 2,805,731,082.24/45,644.80
  6. Step 6: Final answer
    x = 61,468.80

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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.