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Finding the Fourth Proportional to 139,461.81, 192,456.55 and 79,043.88

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Solution

The fourth proportional to 139,461.81, 192,456.55 and 79,043.88 is: 109,080.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,461.81 : 192,456.55 = 79,043.88 : x
  2. Step 2: Convert to fraction form
    139,461.81/192,456.55 = 79,043.88/x
  3. Step 3: Cross multiply
    139,461.81x = 192,456.55 × 79,043.88
  4. Step 4: Simplify right side
    139,461.81x = 15,212,512,245.80
  5. Step 5: Solve for x
    x = 15,212,512,245.80/139,461.81
  6. Step 6: Final answer
    x = 109,080.13

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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.