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Finding the Fourth Proportional to 139,850.84, 192,999.12 and 79,419.80

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Solution

The fourth proportional to 139,850.84, 192,999.12 and 79,419.80 is: 109,602.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,850.84 : 192,999.12 = 79,419.80 : x
  2. Step 2: Convert to fraction form
    139,850.84/192,999.12 = 79,419.80/x
  3. Step 3: Cross multiply
    139,850.84x = 192,999.12 × 79,419.80
  4. Step 4: Simplify right side
    139,850.84x = 15,327,951,510.58
  5. Step 5: Solve for x
    x = 15,327,951,510.58/139,850.84
  6. Step 6: Final answer
    x = 109,602.14

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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.