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Finding the Fourth Proportional to 138,797.64, 207,210.47 and 133,876.89

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Solution

The fourth proportional to 138,797.64, 207,210.47 and 133,876.89 is: 199,864.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,797.64 : 207,210.47 = 133,876.89 : x
  2. Step 2: Convert to fraction form
    138,797.64/207,210.47 = 133,876.89/x
  3. Step 3: Cross multiply
    138,797.64x = 207,210.47 × 133,876.89
  4. Step 4: Simplify right side
    138,797.64x = 27,740,692,629.65
  5. Step 5: Solve for x
    x = 27,740,692,629.65/138,797.64
  6. Step 6: Final answer
    x = 199,864.30

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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.