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Finding the Fourth Proportional to 45,672.32, 68,400.60 and 31,579.88

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Solution

The fourth proportional to 45,672.32, 68,400.60 and 31,579.88 is: 47,295.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,672.32 : 68,400.60 = 31,579.88 : x
  2. Step 2: Convert to fraction form
    45,672.32/68,400.60 = 31,579.88/x
  3. Step 3: Cross multiply
    45,672.32x = 68,400.60 × 31,579.88
  4. Step 4: Simplify right side
    45,672.32x = 2,160,082,739.93
  5. Step 5: Solve for x
    x = 2,160,082,739.93/45,672.32
  6. Step 6: Final answer
    x = 47,295.23

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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.