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Finding the Fourth Proportional to 104,295.80, 143,875.22 and 65,990.80

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Solution

The fourth proportional to 104,295.80, 143,875.22 and 65,990.80 is: 91,033.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,295.80 : 143,875.22 = 65,990.80 : x
  2. Step 2: Convert to fraction form
    104,295.80/143,875.22 = 65,990.80/x
  3. Step 3: Cross multiply
    104,295.80x = 143,875.22 × 65,990.80
  4. Step 4: Simplify right side
    104,295.80x = 9,494,440,148.60
  5. Step 5: Solve for x
    x = 9,494,440,148.60/104,295.80
  6. Step 6: Final answer
    x = 91,033.78

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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.