Home / 138,601.14-191,267.37-78,171.90

Finding the Fourth Proportional to 138,601.14, 191,267.37 and 78,171.90

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Solution

The fourth proportional to 138,601.14, 191,267.37 and 78,171.90 is: 107,875.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,601.14 : 191,267.37 = 78,171.90 : x
  2. Step 2: Convert to fraction form
    138,601.14/191,267.37 = 78,171.90/x
  3. Step 3: Cross multiply
    138,601.14x = 191,267.37 × 78,171.90
  4. Step 4: Simplify right side
    138,601.14x = 14,951,733,720.90
  5. Step 5: Solve for x
    x = 14,951,733,720.90/138,601.14
  6. Step 6: Final answer
    x = 107,875.98

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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.