Home / 129,184.91-178,234.02-78,181.33

Finding the Fourth Proportional to 129,184.91, 178,234.02 and 78,181.33

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Solution

The fourth proportional to 129,184.91, 178,234.02 and 78,181.33 is: 107,865.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,184.91 : 178,234.02 = 78,181.33 : x
  2. Step 2: Convert to fraction form
    129,184.91/178,234.02 = 78,181.33/x
  3. Step 3: Cross multiply
    129,184.91x = 178,234.02 × 78,181.33
  4. Step 4: Simplify right side
    129,184.91x = 13,934,572,289.26
  5. Step 5: Solve for x
    x = 13,934,572,289.26/129,184.91
  6. Step 6: Final answer
    x = 107,865.33

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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.