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Finding the Fourth Proportional to 139,242.60, 192,154.14 and 75,579.84

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Solution

The fourth proportional to 139,242.60, 192,154.14 and 75,579.84 is: 104,299.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,242.60 : 192,154.14 = 75,579.84 : x
  2. Step 2: Convert to fraction form
    139,242.60/192,154.14 = 75,579.84/x
  3. Step 3: Cross multiply
    139,242.60x = 192,154.14 × 75,579.84
  4. Step 4: Simplify right side
    139,242.60x = 14,522,979,156.54
  5. Step 5: Solve for x
    x = 14,522,979,156.54/139,242.60
  6. Step 6: Final answer
    x = 104,299.83

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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.