Home / 138,530.08-191,161.92-78,102.88

Finding the Fourth Proportional to 138,530.08, 191,161.92 and 78,102.88

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Solution

The fourth proportional to 138,530.08, 191,161.92 and 78,102.88 is: 107,776.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,530.08 : 191,161.92 = 78,102.88 : x
  2. Step 2: Convert to fraction form
    138,530.08/191,161.92 = 78,102.88/x
  3. Step 3: Cross multiply
    138,530.08x = 191,161.92 × 78,102.88
  4. Step 4: Simplify right side
    138,530.08x = 14,930,296,498.33
  5. Step 5: Solve for x
    x = 14,930,296,498.33/138,530.08
  6. Step 6: Final answer
    x = 107,776.57

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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.