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Finding the Fourth Proportional to 129,896.41, 179,257.11 and 76,181.64

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Solution

The fourth proportional to 129,896.41, 179,257.11 and 76,181.64 is: 105,130.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,896.41 : 179,257.11 = 76,181.64 : x
  2. Step 2: Convert to fraction form
    129,896.41/179,257.11 = 76,181.64/x
  3. Step 3: Cross multiply
    129,896.41x = 179,257.11 × 76,181.64
  4. Step 4: Simplify right side
    129,896.41x = 13,656,100,703.38
  5. Step 5: Solve for x
    x = 13,656,100,703.38/129,896.41
  6. Step 6: Final answer
    x = 105,130.70

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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.