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Finding the Fourth Proportional to 129,761.41, 179,070.43 and 73,172.41

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Solution

The fourth proportional to 129,761.41, 179,070.43 and 73,172.41 is: 100,977.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,761.41 : 179,070.43 = 73,172.41 : x
  2. Step 2: Convert to fraction form
    129,761.41/179,070.43 = 73,172.41/x
  3. Step 3: Cross multiply
    129,761.41x = 179,070.43 × 73,172.41
  4. Step 4: Simplify right side
    129,761.41x = 13,103,014,922.84
  5. Step 5: Solve for x
    x = 13,103,014,922.84/129,761.41
  6. Step 6: Final answer
    x = 100,977.75

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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.