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Finding the Fourth Proportional to 79,142.70, 118,729.44 and 25,849.56

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Solution

The fourth proportional to 79,142.70, 118,729.44 and 25,849.56 is: 38,779.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,142.70 : 118,729.44 = 25,849.56 : x
  2. Step 2: Convert to fraction form
    79,142.70/118,729.44 = 25,849.56/x
  3. Step 3: Cross multiply
    79,142.70x = 118,729.44 × 25,849.56
  4. Step 4: Simplify right side
    79,142.70x = 3,069,103,783.05
  5. Step 5: Solve for x
    x = 3,069,103,783.05/79,142.70
  6. Step 6: Final answer
    x = 38,779.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.