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Finding the Fourth Proportional to 77,879.20, 116,876.40 and 51,575.20

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Solution

The fourth proportional to 77,879.20, 116,876.40 and 51,575.20 is: 77,400.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,879.20 : 116,876.40 = 51,575.20 : x
  2. Step 2: Convert to fraction form
    77,879.20/116,876.40 = 51,575.20/x
  3. Step 3: Cross multiply
    77,879.20x = 116,876.40 × 51,575.20
  4. Step 4: Simplify right side
    77,879.20x = 6,027,923,705.28
  5. Step 5: Solve for x
    x = 6,027,923,705.28/77,879.20
  6. Step 6: Final answer
    x = 77,400.95

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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.