Home / 138,689.27-208,039.83-54,467.69

Finding the Fourth Proportional to 138,689.27, 208,039.83 and 54,467.69

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Solution

The fourth proportional to 138,689.27, 208,039.83 and 54,467.69 is: 81,703.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,689.27 : 208,039.83 = 54,467.69 : x
  2. Step 2: Convert to fraction form
    138,689.27/208,039.83 = 54,467.69/x
  3. Step 3: Cross multiply
    138,689.27x = 208,039.83 × 54,467.69
  4. Step 4: Simplify right side
    138,689.27x = 11,331,447,963.93
  5. Step 5: Solve for x
    x = 11,331,447,963.93/138,689.27
  6. Step 6: Final answer
    x = 81,703.86

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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.