Home / 138,749.52-191,474.80-75,087.28

Finding the Fourth Proportional to 138,749.52, 191,474.80 and 75,087.28

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Solution

The fourth proportional to 138,749.52, 191,474.80 and 75,087.28 is: 103,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,749.52 : 191,474.80 = 75,087.28 : x
  2. Step 2: Convert to fraction form
    138,749.52/191,474.80 = 75,087.28/x
  3. Step 3: Cross multiply
    138,749.52x = 191,474.80 × 75,087.28
  4. Step 4: Simplify right side
    138,749.52x = 14,377,321,920.54
  5. Step 5: Solve for x
    x = 14,377,321,920.54/138,749.52
  6. Step 6: Final answer
    x = 103,620.70

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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.