Home / 138,965.40-208,726.92-82,914.96

Finding the Fourth Proportional to 138,965.40, 208,726.92 and 82,914.96

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Solution

The fourth proportional to 138,965.40, 208,726.92 and 82,914.96 is: 124,538.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,965.40 : 208,726.92 = 82,914.96 : x
  2. Step 2: Convert to fraction form
    138,965.40/208,726.92 = 82,914.96/x
  3. Step 3: Cross multiply
    138,965.40x = 208,726.92 × 82,914.96
  4. Step 4: Simplify right side
    138,965.40x = 17,306,584,222.72
  5. Step 5: Solve for x
    x = 17,306,584,222.72/138,965.40
  6. Step 6: Final answer
    x = 124,538.80

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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.