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Finding the Fourth Proportional to 135,551.34, 187,016.04 and 81,815.94

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Solution

The fourth proportional to 135,551.34, 187,016.04 and 81,815.94 is: 112,878.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,551.34 : 187,016.04 = 81,815.94 : x
  2. Step 2: Convert to fraction form
    135,551.34/187,016.04 = 81,815.94/x
  3. Step 3: Cross multiply
    135,551.34x = 187,016.04 × 81,815.94
  4. Step 4: Simplify right side
    135,551.34x = 15,300,893,107.68
  5. Step 5: Solve for x
    x = 15,300,893,107.68/135,551.34
  6. Step 6: Final answer
    x = 112,878.95

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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.