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Finding the Fourth Proportional to 140,420.80, 193,758.06 and 79,992.64

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Solution

The fourth proportional to 140,420.80, 193,758.06 and 79,992.64 is: 110,376.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,420.80 : 193,758.06 = 79,992.64 : x
  2. Step 2: Convert to fraction form
    140,420.80/193,758.06 = 79,992.64/x
  3. Step 3: Cross multiply
    140,420.80x = 193,758.06 × 79,992.64
  4. Step 4: Simplify right side
    140,420.80x = 15,499,218,740.68
  5. Step 5: Solve for x
    x = 15,499,218,740.68/140,420.80
  6. Step 6: Final answer
    x = 110,376.94

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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.