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Finding the Fourth Proportional to 140,141.86, 193,400.04 and 79,721.26

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Solution

The fourth proportional to 140,141.86, 193,400.04 and 79,721.26 is: 110,017.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,141.86 : 193,400.04 = 79,721.26 : x
  2. Step 2: Convert to fraction form
    140,141.86/193,400.04 = 79,721.26/x
  3. Step 3: Cross multiply
    140,141.86x = 193,400.04 × 79,721.26
  4. Step 4: Simplify right side
    140,141.86x = 15,418,094,872.85
  5. Step 5: Solve for x
    x = 15,418,094,872.85/140,141.86
  6. Step 6: Final answer
    x = 110,017.77

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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.