Home / 128,629.35-177,508.13-74,181.29

Finding the Fourth Proportional to 128,629.35, 177,508.13 and 74,181.29

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Solution

The fourth proportional to 128,629.35, 177,508.13 and 74,181.29 is: 102,369.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,629.35 : 177,508.13 = 74,181.29 : x
  2. Step 2: Convert to fraction form
    128,629.35/177,508.13 = 74,181.29/x
  3. Step 3: Cross multiply
    128,629.35x = 177,508.13 × 74,181.29
  4. Step 4: Simplify right side
    128,629.35x = 13,167,780,810.44
  5. Step 5: Solve for x
    x = 13,167,780,810.44/128,629.35
  6. Step 6: Final answer
    x = 102,369.96

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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.