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Finding the Fourth Proportional to 45,288.78, 67,943.84 and 13,699.10

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Solution

The fourth proportional to 45,288.78, 67,943.84 and 13,699.10 is: 20,551.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,288.78 : 67,943.84 = 13,699.10 : x
  2. Step 2: Convert to fraction form
    45,288.78/67,943.84 = 13,699.10/x
  3. Step 3: Cross multiply
    45,288.78x = 67,943.84 × 13,699.10
  4. Step 4: Simplify right side
    45,288.78x = 930,769,636.97
  5. Step 5: Solve for x
    x = 930,769,636.97/45,288.78
  6. Step 6: Final answer
    x = 20,551.88

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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.