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Finding the Fourth Proportional to 139,446.79, 192,436.49 and 75,784.64

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Solution

The fourth proportional to 139,446.79, 192,436.49 and 75,784.64 is: 104,582.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,446.79 : 192,436.49 = 75,784.64 : x
  2. Step 2: Convert to fraction form
    139,446.79/192,436.49 = 75,784.64/x
  3. Step 3: Cross multiply
    139,446.79x = 192,436.49 × 75,784.64
  4. Step 4: Simplify right side
    139,446.79x = 14,583,729,344.79
  5. Step 5: Solve for x
    x = 14,583,729,344.79/139,446.79
  6. Step 6: Final answer
    x = 104,582.76

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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.