Home / 138,669.20-208,467.84-109,439.36

Finding the Fourth Proportional to 138,669.20, 208,467.84 and 109,439.36

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Solution

The fourth proportional to 138,669.20, 208,467.84 and 109,439.36 is: 164,525.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,669.20 : 208,467.84 = 109,439.36 : x
  2. Step 2: Convert to fraction form
    138,669.20/208,467.84 = 109,439.36/x
  3. Step 3: Cross multiply
    138,669.20x = 208,467.84 × 109,439.36
  4. Step 4: Simplify right side
    138,669.20x = 22,814,586,990.18
  5. Step 5: Solve for x
    x = 22,814,586,990.18/138,669.20
  6. Step 6: Final answer
    x = 164,525.27

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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.