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Finding the Fourth Proportional to 139,601.28, 192,654.80 and 79,996.80

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Solution

The fourth proportional to 139,601.28, 192,654.80 and 79,996.80 is: 110,398.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,601.28 : 192,654.80 = 79,996.80 : x
  2. Step 2: Convert to fraction form
    139,601.28/192,654.80 = 79,996.80/x
  3. Step 3: Cross multiply
    139,601.28x = 192,654.80 × 79,996.80
  4. Step 4: Simplify right side
    139,601.28x = 15,411,767,504.64
  5. Step 5: Solve for x
    x = 15,411,767,504.64/139,601.28
  6. Step 6: Final answer
    x = 110,398.47

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1.5x scale

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.