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Finding the Fourth Proportional to 139,311.93, 192,248.78 and 75,650.19

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Solution

The fourth proportional to 139,311.93, 192,248.78 and 75,650.19 is: 104,396.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,311.93 : 192,248.78 = 75,650.19 : x
  2. Step 2: Convert to fraction form
    139,311.93/192,248.78 = 75,650.19/x
  3. Step 3: Cross multiply
    139,311.93x = 192,248.78 × 75,650.19
  4. Step 4: Simplify right side
    139,311.93x = 14,543,655,635.08
  5. Step 5: Solve for x
    x = 14,543,655,635.08/139,311.93
  6. Step 6: Final answer
    x = 104,396.34

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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.