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Finding the Fourth Proportional to 140,608.91, 194,042.63 and 100,391.04

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Solution

The fourth proportional to 140,608.91, 194,042.63 and 100,391.04 is: 138,541.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,608.91 : 194,042.63 = 100,391.04 : x
  2. Step 2: Convert to fraction form
    140,608.91/194,042.63 = 100,391.04/x
  3. Step 3: Cross multiply
    140,608.91x = 194,042.63 × 100,391.04
  4. Step 4: Simplify right side
    140,608.91x = 19,480,140,928.08
  5. Step 5: Solve for x
    x = 19,480,140,928.08/140,608.91
  6. Step 6: Final answer
    x = 138,541.30

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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.