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Finding the Fourth Proportional to 45,919, 68,890.06 and 13,087

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Solution

The fourth proportional to 45,919, 68,890.06 and 13,087 is: 19,633.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,919 : 68,890.06 = 13,087 : x
  2. Step 2: Convert to fraction form
    45,919/68,890.06 = 13,087/x
  3. Step 3: Cross multiply
    45,919x = 68,890.06 × 13,087
  4. Step 4: Simplify right side
    45,919x = 901,564,215.22
  5. Step 5: Solve for x
    x = 901,564,215.22/45,919
  6. Step 6: Final answer
    x = 19,633.79

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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.