Home / 138,824.56-208,026.60-91,909.36

Finding the Fourth Proportional to 138,824.56, 208,026.60 and 91,909.36

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Solution

The fourth proportional to 138,824.56, 208,026.60 and 91,909.36 is: 137,724.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,824.56 : 208,026.60 = 91,909.36 : x
  2. Step 2: Convert to fraction form
    138,824.56/208,026.60 = 91,909.36/x
  3. Step 3: Cross multiply
    138,824.56x = 208,026.60 × 91,909.36
  4. Step 4: Simplify right side
    138,824.56x = 19,119,591,668.98
  5. Step 5: Solve for x
    x = 19,119,591,668.98/138,824.56
  6. Step 6: Final answer
    x = 137,724.85

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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.