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Finding the Fourth Proportional to 138,800.58, 191,544.58 and 75,138.36

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Solution

The fourth proportional to 138,800.58, 191,544.58 and 75,138.36 is: 103,690.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,800.58 : 191,544.58 = 75,138.36 : x
  2. Step 2: Convert to fraction form
    138,800.58/191,544.58 = 75,138.36/x
  3. Step 3: Cross multiply
    138,800.58x = 191,544.58 × 75,138.36
  4. Step 4: Simplify right side
    138,800.58x = 14,392,345,608.09
  5. Step 5: Solve for x
    x = 14,392,345,608.09/138,800.58
  6. Step 6: Final answer
    x = 103,690.82

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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.