Home / 138,825.56-208,028.10-91,910.36

Finding the Fourth Proportional to 138,825.56, 208,028.10 and 91,910.36

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Solution

The fourth proportional to 138,825.56, 208,028.10 and 91,910.36 is: 137,726.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,825.56 : 208,028.10 = 91,910.36 : x
  2. Step 2: Convert to fraction form
    138,825.56/208,028.10 = 91,910.36/x
  3. Step 3: Cross multiply
    138,825.56x = 208,028.10 × 91,910.36
  4. Step 4: Simplify right side
    138,825.56x = 19,119,937,561.12
  5. Step 5: Solve for x
    x = 19,119,937,561.12/138,825.56
  6. Step 6: Final answer
    x = 137,726.35

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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.