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Finding the Fourth Proportional to 136,748.88, 188,730.76 and 79,375.92

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Solution

The fourth proportional to 136,748.88, 188,730.76 and 79,375.92 is: 109,548.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,748.88 : 188,730.76 = 79,375.92 : x
  2. Step 2: Convert to fraction form
    136,748.88/188,730.76 = 79,375.92/x
  3. Step 3: Cross multiply
    136,748.88x = 188,730.76 × 79,375.92
  4. Step 4: Simplify right side
    136,748.88x = 14,980,677,707.30
  5. Step 5: Solve for x
    x = 14,980,677,707.30/136,748.88
  6. Step 6: Final answer
    x = 109,548.81

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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.