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Finding the Fourth Proportional to 139,766.54, 192,871.80 and 79,336.08

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Solution

The fourth proportional to 139,766.54, 192,871.80 and 79,336.08 is: 109,480.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,766.54 : 192,871.80 = 79,336.08 : x
  2. Step 2: Convert to fraction form
    139,766.54/192,871.80 = 79,336.08/x
  3. Step 3: Cross multiply
    139,766.54x = 192,871.80 × 79,336.08
  4. Step 4: Simplify right side
    139,766.54x = 15,301,692,554.54
  5. Step 5: Solve for x
    x = 15,301,692,554.54/139,766.54
  6. Step 6: Final answer
    x = 109,480.37

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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.