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Finding the Fourth Proportional to 138,009.90, 207,014.85 and 49,266.30

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Solution

The fourth proportional to 138,009.90, 207,014.85 and 49,266.30 is: 73,899.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,009.90 : 207,014.85 = 49,266.30 : x
  2. Step 2: Convert to fraction form
    138,009.90/207,014.85 = 49,266.30/x
  3. Step 3: Cross multiply
    138,009.90x = 207,014.85 × 49,266.30
  4. Step 4: Simplify right side
    138,009.90x = 10,198,855,704.56
  5. Step 5: Solve for x
    x = 10,198,855,704.56/138,009.90
  6. Step 6: Final answer
    x = 73,899.45

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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.