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Finding the Fourth Proportional to 138,992.59, 208,501.86 and 39,152.62

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Solution

The fourth proportional to 138,992.59, 208,501.86 and 39,152.62 is: 58,732.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,992.59 : 208,501.86 = 39,152.62 : x
  2. Step 2: Convert to fraction form
    138,992.59/208,501.86 = 39,152.62/x
  3. Step 3: Cross multiply
    138,992.59x = 208,501.86 × 39,152.62
  4. Step 4: Simplify right side
    138,992.59x = 8,163,394,093.87
  5. Step 5: Solve for x
    x = 8,163,394,093.87/138,992.59
  6. Step 6: Final answer
    x = 58,732.58

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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.