Home / 135,788.34-187,257.72-81,331.83

Finding the Fourth Proportional to 135,788.34, 187,257.72 and 81,331.83

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Solution

The fourth proportional to 135,788.34, 187,257.72 and 81,331.83 is: 112,159.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,788.34 : 187,257.72 = 81,331.83 : x
  2. Step 2: Convert to fraction form
    135,788.34/187,257.72 = 81,331.83/x
  3. Step 3: Cross multiply
    135,788.34x = 187,257.72 × 81,331.83
  4. Step 4: Simplify right side
    135,788.34x = 15,230,013,049.23
  5. Step 5: Solve for x
    x = 15,230,013,049.23/135,788.34
  6. Step 6: Final answer
    x = 112,159.95

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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.