Home / 138,964.60-208,398.30-72,382.60

Finding the Fourth Proportional to 138,964.60, 208,398.30 and 72,382.60

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Solution

The fourth proportional to 138,964.60, 208,398.30 and 72,382.60 is: 108,548.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,964.60 : 208,398.30 = 72,382.60 : x
  2. Step 2: Convert to fraction form
    138,964.60/208,398.30 = 72,382.60/x
  3. Step 3: Cross multiply
    138,964.60x = 208,398.30 × 72,382.60
  4. Step 4: Simplify right side
    138,964.60x = 15,084,410,789.58
  5. Step 5: Solve for x
    x = 15,084,410,789.58/138,964.60
  6. Step 6: Final answer
    x = 108,548.59

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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.