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Finding the Fourth Proportional to 128,142.71, 192,219.35 and 43,960.76

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Solution

The fourth proportional to 128,142.71, 192,219.35 and 43,960.76 is: 65,942.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,142.71 : 192,219.35 = 43,960.76 : x
  2. Step 2: Convert to fraction form
    128,142.71/192,219.35 = 43,960.76/x
  3. Step 3: Cross multiply
    128,142.71x = 192,219.35 × 43,960.76
  4. Step 4: Simplify right side
    128,142.71x = 8,450,108,252.63
  5. Step 5: Solve for x
    x = 8,450,108,252.63/128,142.71
  6. Step 6: Final answer
    x = 65,942.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.