Home / 102,691.98-141,513.04-78,520.31

Finding the Fourth Proportional to 102,691.98, 141,513.04 and 78,520.31

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Solution

The fourth proportional to 102,691.98, 141,513.04 and 78,520.31 is: 108,203.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,691.98 : 141,513.04 = 78,520.31 : x
  2. Step 2: Convert to fraction form
    102,691.98/141,513.04 = 78,520.31/x
  3. Step 3: Cross multiply
    102,691.98x = 141,513.04 × 78,520.31
  4. Step 4: Simplify right side
    102,691.98x = 11,111,647,769.84
  5. Step 5: Solve for x
    x = 11,111,647,769.84/102,691.98
  6. Step 6: Final answer
    x = 108,203.66

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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.