Home / 129,296.90-178,454.30-80,921.33

Finding the Fourth Proportional to 129,296.90, 178,454.30 and 80,921.33

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Solution

The fourth proportional to 129,296.90, 178,454.30 and 80,921.33 is: 111,686.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,296.90 : 178,454.30 = 80,921.33 : x
  2. Step 2: Convert to fraction form
    129,296.90/178,454.30 = 80,921.33/x
  3. Step 3: Cross multiply
    129,296.90x = 178,454.30 × 80,921.33
  4. Step 4: Simplify right side
    129,296.90x = 14,440,758,003.34
  5. Step 5: Solve for x
    x = 14,440,758,003.34/129,296.90
  6. Step 6: Final answer
    x = 111,686.81

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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.