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Finding the Fourth Proportional to 139,399.86, 192,372 and 75,737.64

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Solution

The fourth proportional to 139,399.86, 192,372 and 75,737.64 is: 104,518.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,399.86 : 192,372 = 75,737.64 : x
  2. Step 2: Convert to fraction form
    139,399.86/192,372 = 75,737.64/x
  3. Step 3: Cross multiply
    139,399.86x = 192,372 × 75,737.64
  4. Step 4: Simplify right side
    139,399.86x = 14,569,801,282.08
  5. Step 5: Solve for x
    x = 14,569,801,282.08/139,399.86
  6. Step 6: Final answer
    x = 104,518.05

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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.