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Finding the Fourth Proportional to 139,131.29, 192,000.20 and 75,469.16

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Solution

The fourth proportional to 139,131.29, 192,000.20 and 75,469.16 is: 104,146.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,131.29 : 192,000.20 = 75,469.16 : x
  2. Step 2: Convert to fraction form
    139,131.29/192,000.20 = 75,469.16/x
  3. Step 3: Cross multiply
    139,131.29x = 192,000.20 × 75,469.16
  4. Step 4: Simplify right side
    139,131.29x = 14,490,092,476.49
  5. Step 5: Solve for x
    x = 14,490,092,476.49/139,131.29
  6. Step 6: Final answer
    x = 104,146.90

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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.