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Finding the Fourth Proportional to 139,761.88, 192,861.64 and 79,333.76

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Solution

The fourth proportional to 139,761.88, 192,861.64 and 79,333.76 is: 109,475.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,761.88 : 192,861.64 = 79,333.76 : x
  2. Step 2: Convert to fraction form
    139,761.88/192,861.64 = 79,333.76/x
  3. Step 3: Cross multiply
    139,761.88x = 192,861.64 × 79,333.76
  4. Step 4: Simplify right side
    139,761.88x = 15,300,439,060.97
  5. Step 5: Solve for x
    x = 15,300,439,060.97/139,761.88
  6. Step 6: Final answer
    x = 109,475.05

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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.