Home / 138,942.39-191,739.27-75,280.05

Finding the Fourth Proportional to 138,942.39, 191,739.27 and 75,280.05

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Solution

The fourth proportional to 138,942.39, 191,739.27 and 75,280.05 is: 103,885.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,942.39 : 191,739.27 = 75,280.05 : x
  2. Step 2: Convert to fraction form
    138,942.39/191,739.27 = 75,280.05/x
  3. Step 3: Cross multiply
    138,942.39x = 191,739.27 × 75,280.05
  4. Step 4: Simplify right side
    138,942.39x = 14,434,141,832.56
  5. Step 5: Solve for x
    x = 14,434,141,832.56/138,942.39
  6. Step 6: Final answer
    x = 103,885.80

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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.