Home / 138,942.88-191,784.78-88,641.84

Finding the Fourth Proportional to 138,942.88, 191,784.78 and 88,641.84

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Solution

The fourth proportional to 138,942.88, 191,784.78 and 88,641.84 is: 122,353.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,942.88 : 191,784.78 = 88,641.84 : x
  2. Step 2: Convert to fraction form
    138,942.88/191,784.78 = 88,641.84/x
  3. Step 3: Cross multiply
    138,942.88x = 191,784.78 × 88,641.84
  4. Step 4: Simplify right side
    138,942.88x = 17,000,155,930.25
  5. Step 5: Solve for x
    x = 17,000,155,930.25/138,942.88
  6. Step 6: Final answer
    x = 122,353.56

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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.