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Finding the Fourth Proportional to 98,380.99, 135,748.82 and 55,354.51

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Solution

The fourth proportional to 98,380.99, 135,748.82 and 55,354.51 is: 76,379.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,380.99 : 135,748.82 = 55,354.51 : x
  2. Step 2: Convert to fraction form
    98,380.99/135,748.82 = 55,354.51/x
  3. Step 3: Cross multiply
    98,380.99x = 135,748.82 × 55,354.51
  4. Step 4: Simplify right side
    98,380.99x = 7,514,309,137.41
  5. Step 5: Solve for x
    x = 7,514,309,137.41/98,380.99
  6. Step 6: Final answer
    x = 76,379.69

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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.