Home / 135,910.90-187,581.48-78,542.30

Finding the Fourth Proportional to 135,910.90, 187,581.48 and 78,542.30

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Solution

The fourth proportional to 135,910.90, 187,581.48 and 78,542.30 is: 108,402.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,910.90 : 187,581.48 = 78,542.30 : x
  2. Step 2: Convert to fraction form
    135,910.90/187,581.48 = 78,542.30/x
  3. Step 3: Cross multiply
    135,910.90x = 187,581.48 × 78,542.30
  4. Step 4: Simplify right side
    135,910.90x = 14,733,080,876.60
  5. Step 5: Solve for x
    x = 14,733,080,876.60/135,910.90
  6. Step 6: Final answer
    x = 108,402.50

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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.