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Finding the Fourth Proportional to 139,697.34, 192,808.90 and 79,273.61

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Solution

The fourth proportional to 139,697.34, 192,808.90 and 79,273.61 is: 109,412.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,697.34 : 192,808.90 = 79,273.61 : x
  2. Step 2: Convert to fraction form
    139,697.34/192,808.90 = 79,273.61/x
  3. Step 3: Cross multiply
    139,697.34x = 192,808.90 × 79,273.61
  4. Step 4: Simplify right side
    139,697.34x = 15,284,657,624.17
  5. Step 5: Solve for x
    x = 15,284,657,624.17/139,697.34
  6. Step 6: Final answer
    x = 109,412.66

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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.