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Finding the Fourth Proportional to 104,676.94, 144,398.10 and 72,790.48

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Solution

The fourth proportional to 104,676.94, 144,398.10 and 72,790.48 is: 100,411.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,676.94 : 144,398.10 = 72,790.48 : x
  2. Step 2: Convert to fraction form
    104,676.94/144,398.10 = 72,790.48/x
  3. Step 3: Cross multiply
    104,676.94x = 144,398.10 × 72,790.48
  4. Step 4: Simplify right side
    104,676.94x = 10,510,807,010.09
  5. Step 5: Solve for x
    x = 10,510,807,010.09/104,676.94
  6. Step 6: Final answer
    x = 100,411.87

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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.