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Finding the Fourth Proportional to 139,238.11, 192,148.81 and 75,575.93

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Solution

The fourth proportional to 139,238.11, 192,148.81 and 75,575.93 is: 104,294.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,238.11 : 192,148.81 = 75,575.93 : x
  2. Step 2: Convert to fraction form
    139,238.11/192,148.81 = 75,575.93/x
  3. Step 3: Cross multiply
    139,238.11x = 192,148.81 × 75,575.93
  4. Step 4: Simplify right side
    139,238.11x = 14,521,825,014.14
  5. Step 5: Solve for x
    x = 14,521,825,014.14/139,238.11
  6. Step 6: Final answer
    x = 104,294.90

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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.