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Finding the Fourth Proportional to 139,885.50, 193,035.95 and 79,455.95

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Solution

The fourth proportional to 139,885.50, 193,035.95 and 79,455.95 is: 109,645.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,885.50 : 193,035.95 = 79,455.95 : x
  2. Step 2: Convert to fraction form
    139,885.50/193,035.95 = 79,455.95/x
  3. Step 3: Cross multiply
    139,885.50x = 193,035.95 × 79,455.95
  4. Step 4: Simplify right side
    139,885.50x = 15,337,854,791.40
  5. Step 5: Solve for x
    x = 15,337,854,791.40/139,885.50
  6. Step 6: Final answer
    x = 109,645.78

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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.