Home / 138,469.44-191,089.05-78,028.50

Finding the Fourth Proportional to 138,469.44, 191,089.05 and 78,028.50

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Solution

The fourth proportional to 138,469.44, 191,089.05 and 78,028.50 is: 107,680.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,469.44 : 191,089.05 = 78,028.50 : x
  2. Step 2: Convert to fraction form
    138,469.44/191,089.05 = 78,028.50/x
  3. Step 3: Cross multiply
    138,469.44x = 191,089.05 × 78,028.50
  4. Step 4: Simplify right side
    138,469.44x = 14,910,391,937.93
  5. Step 5: Solve for x
    x = 14,910,391,937.93/138,469.44
  6. Step 6: Final answer
    x = 107,680.02

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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.