Home / 138,468.21-191,087.31-78,027.27

Finding the Fourth Proportional to 138,468.21, 191,087.31 and 78,027.27

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Solution

The fourth proportional to 138,468.21, 191,087.31 and 78,027.27 is: 107,678.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,468.21 : 191,087.31 = 78,027.27 : x
  2. Step 2: Convert to fraction form
    138,468.21/191,087.31 = 78,027.27/x
  3. Step 3: Cross multiply
    138,468.21x = 191,087.31 × 78,027.27
  4. Step 4: Simplify right side
    138,468.21x = 14,910,021,130.94
  5. Step 5: Solve for x
    x = 14,910,021,130.94/138,468.21
  6. Step 6: Final answer
    x = 107,678.30

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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.