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Finding the Fourth Proportional to 139,487.72, 192,497.04 and 85,043.04

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Solution

The fourth proportional to 139,487.72, 192,497.04 and 85,043.04 is: 117,361.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,487.72 : 192,497.04 = 85,043.04 : x
  2. Step 2: Convert to fraction form
    139,487.72/192,497.04 = 85,043.04/x
  3. Step 3: Cross multiply
    139,487.72x = 192,497.04 × 85,043.04
  4. Step 4: Simplify right side
    139,487.72x = 16,370,533,472.60
  5. Step 5: Solve for x
    x = 16,370,533,472.60/139,487.72
  6. Step 6: Final answer
    x = 117,361.83

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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.