Home / 129,018.22-178,039.08-71,661.26

Finding the Fourth Proportional to 129,018.22, 178,039.08 and 71,661.26

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Solution

The fourth proportional to 129,018.22, 178,039.08 and 71,661.26 is: 98,889.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,018.22 : 178,039.08 = 71,661.26 : x
  2. Step 2: Convert to fraction form
    129,018.22/178,039.08 = 71,661.26/x
  3. Step 3: Cross multiply
    129,018.22x = 178,039.08 × 71,661.26
  4. Step 4: Simplify right side
    129,018.22x = 12,758,503,911.85
  5. Step 5: Solve for x
    x = 12,758,503,911.85/129,018.22
  6. Step 6: Final answer
    x = 98,889.17

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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.