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Finding the Fourth Proportional to 139,399.68, 192,369.60 and 75,737.28

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Solution

The fourth proportional to 139,399.68, 192,369.60 and 75,737.28 is: 104,516.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,399.68 : 192,369.60 = 75,737.28 : x
  2. Step 2: Convert to fraction form
    139,399.68/192,369.60 = 75,737.28/x
  3. Step 3: Cross multiply
    139,399.68x = 192,369.60 × 75,737.28
  4. Step 4: Simplify right side
    139,399.68x = 14,569,550,258.69
  5. Step 5: Solve for x
    x = 14,569,550,258.69/139,399.68
  6. Step 6: Final answer
    x = 104,516.38

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1.5x scale

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.