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Finding the Fourth Proportional to 135,958.80, 187,649.82 and 86,868.86

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Solution

The fourth proportional to 135,958.80, 187,649.82 and 86,868.86 is: 119,896.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,958.80 : 187,649.82 = 86,868.86 : x
  2. Step 2: Convert to fraction form
    135,958.80/187,649.82 = 86,868.86/x
  3. Step 3: Cross multiply
    135,958.80x = 187,649.82 × 86,868.86
  4. Step 4: Simplify right side
    135,958.80x = 16,300,925,942.61
  5. Step 5: Solve for x
    x = 16,300,925,942.61/135,958.80
  6. Step 6: Final answer
    x = 119,896.07

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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.