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Finding the Fourth Proportional to 110,639.80, 165,761.70 and 67,283.80

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Solution

The fourth proportional to 110,639.80, 165,761.70 and 67,283.80 is: 100,805.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,639.80 : 165,761.70 = 67,283.80 : x
  2. Step 2: Convert to fraction form
    110,639.80/165,761.70 = 67,283.80/x
  3. Step 3: Cross multiply
    110,639.80x = 165,761.70 × 67,283.80
  4. Step 4: Simplify right side
    110,639.80x = 11,153,077,070.46
  5. Step 5: Solve for x
    x = 11,153,077,070.46/110,639.80
  6. Step 6: Final answer
    x = 100,805.29

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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.