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Finding the Fourth Proportional to 135,979.32, 187,663.32 and 79,408.92

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Solution

The fourth proportional to 135,979.32, 187,663.32 and 79,408.92 is: 109,591.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,979.32 : 187,663.32 = 79,408.92 : x
  2. Step 2: Convert to fraction form
    135,979.32/187,663.32 = 79,408.92/x
  3. Step 3: Cross multiply
    135,979.32x = 187,663.32 × 79,408.92
  4. Step 4: Simplify right side
    135,979.32x = 14,902,141,564.81
  5. Step 5: Solve for x
    x = 14,902,141,564.81/135,979.32
  6. Step 6: Final answer
    x = 109,591.23

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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.