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Finding the Fourth Proportional to 139,163.89, 192,146.03 and 85,520.83

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Solution

The fourth proportional to 139,163.89, 192,146.03 and 85,520.83 is: 118,080.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,163.89 : 192,146.03 = 85,520.83 : x
  2. Step 2: Convert to fraction form
    139,163.89/192,146.03 = 85,520.83/x
  3. Step 3: Cross multiply
    139,163.89x = 192,146.03 × 85,520.83
  4. Step 4: Simplify right side
    139,163.89x = 16,432,487,966.80
  5. Step 5: Solve for x
    x = 16,432,487,966.80/139,163.89
  6. Step 6: Final answer
    x = 118,080.11

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1.5x scale

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.