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Finding the Fourth Proportional to 139,846.17, 192,989.04 and 79,418.07

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Solution

The fourth proportional to 139,846.17, 192,989.04 and 79,418.07 is: 109,597.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,846.17 : 192,989.04 = 79,418.07 : x
  2. Step 2: Convert to fraction form
    139,846.17/192,989.04 = 79,418.07/x
  3. Step 3: Cross multiply
    139,846.17x = 192,989.04 × 79,418.07
  4. Step 4: Simplify right side
    139,846.17x = 15,326,817,087.95
  5. Step 5: Solve for x
    x = 15,326,817,087.95/139,846.17
  6. Step 6: Final answer
    x = 109,597.69

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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.