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Finding the Fourth Proportional to 140,430.78, 193,747.16 and 79,958.66

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Solution

The fourth proportional to 140,430.78, 193,747.16 and 79,958.66 is: 110,316.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,430.78 : 193,747.16 = 79,958.66 : x
  2. Step 2: Convert to fraction form
    140,430.78/193,747.16 = 79,958.66/x
  3. Step 3: Cross multiply
    140,430.78x = 193,747.16 × 79,958.66
  4. Step 4: Simplify right side
    140,430.78x = 15,491,761,923.88
  5. Step 5: Solve for x
    x = 15,491,761,923.88/140,430.78
  6. Step 6: Final answer
    x = 110,316.00

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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.