Home / 138,743.22-191,465.64-75,081.02

Finding the Fourth Proportional to 138,743.22, 191,465.64 and 75,081.02

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Solution

The fourth proportional to 138,743.22, 191,465.64 and 75,081.02 is: 103,611.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,743.22 : 191,465.64 = 75,081.02 : x
  2. Step 2: Convert to fraction form
    138,743.22/191,465.64 = 75,081.02/x
  3. Step 3: Cross multiply
    138,743.22x = 191,465.64 × 75,081.02
  4. Step 4: Simplify right side
    138,743.22x = 14,375,435,947.37
  5. Step 5: Solve for x
    x = 14,375,435,947.37/138,743.22
  6. Step 6: Final answer
    x = 103,611.81

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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.