Home / 138,939.40-191,684.58-91,219.24

Finding the Fourth Proportional to 138,939.40, 191,684.58 and 91,219.24

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Solution

The fourth proportional to 138,939.40, 191,684.58 and 91,219.24 is: 125,848.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,939.40 : 191,684.58 = 91,219.24 : x
  2. Step 2: Convert to fraction form
    138,939.40/191,684.58 = 91,219.24/x
  3. Step 3: Cross multiply
    138,939.40x = 191,684.58 × 91,219.24
  4. Step 4: Simplify right side
    138,939.40x = 17,485,321,707.32
  5. Step 5: Solve for x
    x = 17,485,321,707.32/138,939.40
  6. Step 6: Final answer
    x = 125,848.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.