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Finding the Fourth Proportional to 138,798.64, 207,211.96 and 133,877.89

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Solution

The fourth proportional to 138,798.64, 207,211.96 and 133,877.89 is: 199,865.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,798.64 : 207,211.96 = 133,877.89 : x
  2. Step 2: Convert to fraction form
    138,798.64/207,211.96 = 133,877.89/x
  3. Step 3: Cross multiply
    138,798.64x = 207,211.96 × 133,877.89
  4. Step 4: Simplify right side
    138,798.64x = 27,741,099,987.56
  5. Step 5: Solve for x
    x = 27,741,099,987.56/138,798.64
  6. Step 6: Final answer
    x = 199,865.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.