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Finding the Fourth Proportional to 139,266.54, 192,167.54 and 79,639.02

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Solution

The fourth proportional to 139,266.54, 192,167.54 and 79,639.02 is: 109,890.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,266.54 : 192,167.54 = 79,639.02 : x
  2. Step 2: Convert to fraction form
    139,266.54/192,167.54 = 79,639.02/x
  3. Step 3: Cross multiply
    139,266.54x = 192,167.54 × 79,639.02
  4. Step 4: Simplify right side
    139,266.54x = 15,304,034,561.41
  5. Step 5: Solve for x
    x = 15,304,034,561.41/139,266.54
  6. Step 6: Final answer
    x = 109,890.25

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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.