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Finding the Fourth Proportional to 79,876.36, 119,948.22 and 76,697.80

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Solution

The fourth proportional to 79,876.36, 119,948.22 and 76,697.80 is: 115,175.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,876.36 : 119,948.22 = 76,697.80 : x
  2. Step 2: Convert to fraction form
    79,876.36/119,948.22 = 76,697.80/x
  3. Step 3: Cross multiply
    79,876.36x = 119,948.22 × 76,697.80
  4. Step 4: Simplify right side
    79,876.36x = 9,199,764,587.92
  5. Step 5: Solve for x
    x = 9,199,764,587.92/79,876.36
  6. Step 6: Final answer
    x = 115,175.06

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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.