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Finding the Fourth Proportional to 139,465.80, 192,462.24 and 79,047.92

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Solution

The fourth proportional to 139,465.80, 192,462.24 and 79,047.92 is: 109,085.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,465.80 : 192,462.24 = 79,047.92 : x
  2. Step 2: Convert to fraction form
    139,465.80/192,462.24 = 79,047.92/x
  3. Step 3: Cross multiply
    139,465.80x = 192,462.24 × 79,047.92
  4. Step 4: Simplify right side
    139,465.80x = 15,213,739,750.54
  5. Step 5: Solve for x
    x = 15,213,739,750.54/139,465.80
  6. Step 6: Final answer
    x = 109,085.81

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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.