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Finding the Fourth Proportional to 79,876.92, 119,610.45 and 77,511.99

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Solution

The fourth proportional to 79,876.92, 119,610.45 and 77,511.99 is: 116,069.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,876.92 : 119,610.45 = 77,511.99 : x
  2. Step 2: Convert to fraction form
    79,876.92/119,610.45 = 77,511.99/x
  3. Step 3: Cross multiply
    79,876.92x = 119,610.45 × 77,511.99
  4. Step 4: Simplify right side
    79,876.92x = 9,271,244,004.30
  5. Step 5: Solve for x
    x = 9,271,244,004.30/79,876.92
  6. Step 6: Final answer
    x = 116,069.12

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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.