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Finding the Fourth Proportional to 139,455.84, 192,406.32 and 79,016.88

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Solution

The fourth proportional to 139,455.84, 192,406.32 and 79,016.88 is: 109,019.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,455.84 : 192,406.32 = 79,016.88 : x
  2. Step 2: Convert to fraction form
    139,455.84/192,406.32 = 79,016.88/x
  3. Step 3: Cross multiply
    139,455.84x = 192,406.32 × 79,016.88
  4. Step 4: Simplify right side
    139,455.84x = 15,203,347,098.68
  5. Step 5: Solve for x
    x = 15,203,347,098.68/139,455.84
  6. Step 6: Final answer
    x = 109,019.08

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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.