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Finding the Fourth Proportional to 78,811.70, 108,800.26 and 60,866.42

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Solution

The fourth proportional to 78,811.70, 108,800.26 and 60,866.42 is: 84,026.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,811.70 : 108,800.26 = 60,866.42 : x
  2. Step 2: Convert to fraction form
    78,811.70/108,800.26 = 60,866.42/x
  3. Step 3: Cross multiply
    78,811.70x = 108,800.26 × 60,866.42
  4. Step 4: Simplify right side
    78,811.70x = 6,622,282,321.27
  5. Step 5: Solve for x
    x = 6,622,282,321.27/78,811.70
  6. Step 6: Final answer
    x = 84,026.64

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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.