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Finding the Fourth Proportional to 139,422.68, 192,438.32 and 79,029.36

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Solution

The fourth proportional to 139,422.68, 192,438.32 and 79,029.36 is: 109,080.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,422.68 : 192,438.32 = 79,029.36 : x
  2. Step 2: Convert to fraction form
    139,422.68/192,438.32 = 79,029.36/x
  3. Step 3: Cross multiply
    139,422.68x = 192,438.32 × 79,029.36
  4. Step 4: Simplify right side
    139,422.68x = 15,208,277,269.08
  5. Step 5: Solve for x
    x = 15,208,277,269.08/139,422.68
  6. Step 6: Final answer
    x = 109,080.37

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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.