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Finding the Fourth Proportional to 45,785.66, 68,667.72 and 12,497.79

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Solution

The fourth proportional to 45,785.66, 68,667.72 and 12,497.79 is: 18,743.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,785.66 : 68,667.72 = 12,497.79 : x
  2. Step 2: Convert to fraction form
    45,785.66/68,667.72 = 12,497.79/x
  3. Step 3: Cross multiply
    45,785.66x = 68,667.72 × 12,497.79
  4. Step 4: Simplify right side
    45,785.66x = 858,194,744.34
  5. Step 5: Solve for x
    x = 858,194,744.34/45,785.66
  6. Step 6: Final answer
    x = 18,743.75

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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.