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Finding the Fourth Proportional to 81,998.34, 113,163.50 and 45,702.09

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Solution

The fourth proportional to 81,998.34, 113,163.50 and 45,702.09 is: 63,072.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,998.34 : 113,163.50 = 45,702.09 : x
  2. Step 2: Convert to fraction form
    81,998.34/113,163.50 = 45,702.09/x
  3. Step 3: Cross multiply
    81,998.34x = 113,163.50 × 45,702.09
  4. Step 4: Simplify right side
    81,998.34x = 5,171,808,233.20
  5. Step 5: Solve for x
    x = 5,171,808,233.20/81,998.34
  6. Step 6: Final answer
    x = 63,072.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.