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Finding the Fourth Proportional to 138,644.16, 208,044 and 55,544.64

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Solution

The fourth proportional to 138,644.16, 208,044 and 55,544.64 is: 83,348.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,644.16 : 208,044 = 55,544.64 : x
  2. Step 2: Convert to fraction form
    138,644.16/208,044 = 55,544.64/x
  3. Step 3: Cross multiply
    138,644.16x = 208,044 × 55,544.64
  4. Step 4: Simplify right side
    138,644.16x = 11,555,729,084.16
  5. Step 5: Solve for x
    x = 11,555,729,084.16/138,644.16
  6. Step 6: Final answer
    x = 83,348.11

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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.