Home / 138,435.80-207,671.00-54,185.09

Finding the Fourth Proportional to 138,435.80, 207,671.00 and 54,185.09

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Solution

The fourth proportional to 138,435.80, 207,671.00 and 54,185.09 is: 81,284.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,435.80 : 207,671.00 = 54,185.09 : x
  2. Step 2: Convert to fraction form
    138,435.80/207,671.00 = 54,185.09/x
  3. Step 3: Cross multiply
    138,435.80x = 207,671.00 × 54,185.09
  4. Step 4: Simplify right side
    138,435.80x = 11,252,670,516.11
  5. Step 5: Solve for x
    x = 11,252,670,516.11/138,435.80
  6. Step 6: Final answer
    x = 81,284.40

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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.