Home / 129,181.41-178,285.10-71,826.44

Finding the Fourth Proportional to 129,181.41, 178,285.10 and 71,826.44

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Solution

The fourth proportional to 129,181.41, 178,285.10 and 71,826.44 is: 99,128.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,181.41 : 178,285.10 = 71,826.44 : x
  2. Step 2: Convert to fraction form
    129,181.41/178,285.10 = 71,826.44/x
  3. Step 3: Cross multiply
    129,181.41x = 178,285.10 × 71,826.44
  4. Step 4: Simplify right side
    129,181.41x = 12,805,582,787.49
  5. Step 5: Solve for x
    x = 12,805,582,787.49/129,181.41
  6. Step 6: Final answer
    x = 99,128.68

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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.