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Finding the Fourth Proportional to 139,516.65, 192,534.39 and 75,855.87

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Solution

The fourth proportional to 139,516.65, 192,534.39 and 75,855.87 is: 104,681.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,516.65 : 192,534.39 = 75,855.87 : x
  2. Step 2: Convert to fraction form
    139,516.65/192,534.39 = 75,855.87/x
  3. Step 3: Cross multiply
    139,516.65x = 192,534.39 × 75,855.87
  4. Step 4: Simplify right side
    139,516.65x = 14,604,863,658.37
  5. Step 5: Solve for x
    x = 14,604,863,658.37/139,516.65
  6. Step 6: Final answer
    x = 104,681.87

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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.