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Finding the Fourth Proportional to 78,620.52, 108,602.46 and 62,815.80

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Solution

The fourth proportional to 78,620.52, 108,602.46 and 62,815.80 is: 86,770.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,620.52 : 108,602.46 = 62,815.80 : x
  2. Step 2: Convert to fraction form
    78,620.52/108,602.46 = 62,815.80/x
  3. Step 3: Cross multiply
    78,620.52x = 108,602.46 × 62,815.80
  4. Step 4: Simplify right side
    78,620.52x = 6,821,950,406.87
  5. Step 5: Solve for x
    x = 6,821,950,406.87/78,620.52
  6. Step 6: Final answer
    x = 86,770.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.