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Finding the Fourth Proportional to 79,315.88, 118,977.05 and 20,153.07

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Solution

The fourth proportional to 79,315.88, 118,977.05 and 20,153.07 is: 30,230.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,315.88 : 118,977.05 = 20,153.07 : x
  2. Step 2: Convert to fraction form
    79,315.88/118,977.05 = 20,153.07/x
  3. Step 3: Cross multiply
    79,315.88x = 118,977.05 × 20,153.07
  4. Step 4: Simplify right side
    79,315.88x = 2,397,752,867.43
  5. Step 5: Solve for x
    x = 2,397,752,867.43/79,315.88
  6. Step 6: Final answer
    x = 30,230.43

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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.