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Finding the Fourth Proportional to 138,555.80, 191,206.38 and 74,893.44

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Solution

The fourth proportional to 138,555.80, 191,206.38 and 74,893.44 is: 103,352.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,555.80 : 191,206.38 = 74,893.44 : x
  2. Step 2: Convert to fraction form
    138,555.80/191,206.38 = 74,893.44/x
  3. Step 3: Cross multiply
    138,555.80x = 191,206.38 × 74,893.44
  4. Step 4: Simplify right side
    138,555.80x = 14,320,103,548.15
  5. Step 5: Solve for x
    x = 14,320,103,548.15/138,555.80
  6. Step 6: Final answer
    x = 103,352.61

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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.