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Finding the Fourth Proportional to 139,573.95, 192,614.49 and 75,912.18

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Solution

The fourth proportional to 139,573.95, 192,614.49 and 75,912.18 is: 104,760.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,573.95 : 192,614.49 = 75,912.18 : x
  2. Step 2: Convert to fraction form
    139,573.95/192,614.49 = 75,912.18/x
  3. Step 3: Cross multiply
    139,573.95x = 192,614.49 × 75,912.18
  4. Step 4: Simplify right side
    139,573.95x = 14,621,785,835.49
  5. Step 5: Solve for x
    x = 14,621,785,835.49/139,573.95
  6. Step 6: Final answer
    x = 104,760.13

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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.