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Finding the Fourth Proportional to 139,311.81, 192,248.55 and 75,650.04

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Solution

The fourth proportional to 139,311.81, 192,248.55 and 75,650.04 is: 104,396.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,311.81 : 192,248.55 = 75,650.04 : x
  2. Step 2: Convert to fraction form
    139,311.81/192,248.55 = 75,650.04/x
  3. Step 3: Cross multiply
    139,311.81x = 192,248.55 × 75,650.04
  4. Step 4: Simplify right side
    139,311.81x = 14,543,610,497.44
  5. Step 5: Solve for x
    x = 14,543,610,497.44/139,311.81
  6. Step 6: Final answer
    x = 104,396.11

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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.