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Finding the Fourth Proportional to 81,279.68, 112,163.35 and 45,468.92

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Solution

The fourth proportional to 81,279.68, 112,163.35 and 45,468.92 is: 62,745.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,279.68 : 112,163.35 = 45,468.92 : x
  2. Step 2: Convert to fraction form
    81,279.68/112,163.35 = 45,468.92/x
  3. Step 3: Cross multiply
    81,279.68x = 112,163.35 × 45,468.92
  4. Step 4: Simplify right side
    81,279.68x = 5,099,945,599.92
  5. Step 5: Solve for x
    x = 5,099,945,599.92/81,279.68
  6. Step 6: Final answer
    x = 62,745.64

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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.