Home / 129,301.05-178,393.91-78,297.48

Finding the Fourth Proportional to 129,301.05, 178,393.91 and 78,297.48

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Solution

The fourth proportional to 129,301.05, 178,393.91 and 78,297.48 is: 108,025.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,301.05 : 178,393.91 = 78,297.48 : x
  2. Step 2: Convert to fraction form
    129,301.05/178,393.91 = 78,297.48/x
  3. Step 3: Cross multiply
    129,301.05x = 178,393.91 × 78,297.48
  4. Step 4: Simplify right side
    129,301.05x = 13,967,793,600.35
  5. Step 5: Solve for x
    x = 13,967,793,600.35/129,301.05
  6. Step 6: Final answer
    x = 108,025.37

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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.