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Finding the Fourth Proportional to 139,187.20, 192,078.90 and 75,524.98

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Solution

The fourth proportional to 139,187.20, 192,078.90 and 75,524.98 is: 104,224.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,187.20 : 192,078.90 = 75,524.98 : x
  2. Step 2: Convert to fraction form
    139,187.20/192,078.90 = 75,524.98/x
  3. Step 3: Cross multiply
    139,187.20x = 192,078.90 × 75,524.98
  4. Step 4: Simplify right side
    139,187.20x = 14,506,755,080.92
  5. Step 5: Solve for x
    x = 14,506,755,080.92/139,187.20
  6. Step 6: Final answer
    x = 104,224.78

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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.