Home / 80,128.12-110,503.65-68,794

Finding the Fourth Proportional to 80,128.12, 110,503.65 and 68,794

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Solution

The fourth proportional to 80,128.12, 110,503.65 and 68,794 is: 94,872.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,128.12 : 110,503.65 = 68,794 : x
  2. Step 2: Convert to fraction form
    80,128.12/110,503.65 = 68,794/x
  3. Step 3: Cross multiply
    80,128.12x = 110,503.65 × 68,794
  4. Step 4: Simplify right side
    80,128.12x = 7,601,988,098.10
  5. Step 5: Solve for x
    x = 7,601,988,098.10/80,128.12
  6. Step 6: Final answer
    x = 94,872.91

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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.