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Finding the Fourth Proportional to 139,390.63, 192,358.56 and 75,727.87

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Solution

The fourth proportional to 139,390.63, 192,358.56 and 75,727.87 is: 104,504.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,390.63 : 192,358.56 = 75,727.87 : x
  2. Step 2: Convert to fraction form
    139,390.63/192,358.56 = 75,727.87/x
  3. Step 3: Cross multiply
    139,390.63x = 192,358.56 × 75,727.87
  4. Step 4: Simplify right side
    139,390.63x = 14,566,903,544.17
  5. Step 5: Solve for x
    x = 14,566,903,544.17/139,390.63
  6. Step 6: Final answer
    x = 104,504.18

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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.