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Finding the Fourth Proportional to 138,990.99, 208,486.25 and 49,100.12

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Solution

The fourth proportional to 138,990.99, 208,486.25 and 49,100.12 is: 73,650.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,990.99 : 208,486.25 = 49,100.12 : x
  2. Step 2: Convert to fraction form
    138,990.99/208,486.25 = 49,100.12/x
  3. Step 3: Cross multiply
    138,990.99x = 208,486.25 × 49,100.12
  4. Step 4: Simplify right side
    138,990.99x = 10,236,701,020.29
  5. Step 5: Solve for x
    x = 10,236,701,020.29/138,990.99
  6. Step 6: Final answer
    x = 73,650.11

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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.