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Finding the Fourth Proportional to 79,132.80, 118,468.80 and 76,828.80

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Solution

The fourth proportional to 79,132.80, 118,468.80 and 76,828.80 is: 115,019.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,132.80 : 118,468.80 = 76,828.80 : x
  2. Step 2: Convert to fraction form
    79,132.80/118,468.80 = 76,828.80/x
  3. Step 3: Cross multiply
    79,132.80x = 118,468.80 × 76,828.80
  4. Step 4: Simplify right side
    79,132.80x = 9,101,815,741.44
  5. Step 5: Solve for x
    x = 9,101,815,741.44/79,132.80
  6. Step 6: Final answer
    x = 115,019.51

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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.