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Finding the Fourth Proportional to 129,871.76, 179,221.28 and 72,511.96

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Solution

The fourth proportional to 129,871.76, 179,221.28 and 72,511.96 is: 100,065.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,871.76 : 179,221.28 = 72,511.96 : x
  2. Step 2: Convert to fraction form
    129,871.76/179,221.28 = 72,511.96/x
  3. Step 3: Cross multiply
    129,871.76x = 179,221.28 × 72,511.96
  4. Step 4: Simplify right side
    129,871.76x = 12,995,686,286.51
  5. Step 5: Solve for x
    x = 12,995,686,286.51/129,871.76
  6. Step 6: Final answer
    x = 100,065.53

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