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Finding the Fourth Proportional to 138,758.94, 208,100.61 and 38,912.94

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Solution

The fourth proportional to 138,758.94, 208,100.61 and 38,912.94 is: 58,358.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,758.94 : 208,100.61 = 38,912.94 : x
  2. Step 2: Convert to fraction form
    138,758.94/208,100.61 = 38,912.94/x
  3. Step 3: Cross multiply
    138,758.94x = 208,100.61 × 38,912.94
  4. Step 4: Simplify right side
    138,758.94x = 8,097,806,550.89
  5. Step 5: Solve for x
    x = 8,097,806,550.89/138,758.94
  6. Step 6: Final answer
    x = 58,358.81

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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.