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Finding the Fourth Proportional to 135,672.70, 187,239.82 and 75,262.81

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Solution

The fourth proportional to 135,672.70, 187,239.82 and 75,262.81 is: 103,869.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,672.70 : 187,239.82 = 75,262.81 : x
  2. Step 2: Convert to fraction form
    135,672.70/187,239.82 = 75,262.81/x
  3. Step 3: Cross multiply
    135,672.70x = 187,239.82 × 75,262.81
  4. Step 4: Simplify right side
    135,672.70x = 14,092,194,997.09
  5. Step 5: Solve for x
    x = 14,092,194,997.09/135,672.70
  6. Step 6: Final answer
    x = 103,869.05

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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.