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Finding the Fourth Proportional to 100,748.98, 138,149.45 and 98,124.58

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Solution

The fourth proportional to 100,748.98, 138,149.45 and 98,124.58 is: 134,550.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,748.98 : 138,149.45 = 98,124.58 : x
  2. Step 2: Convert to fraction form
    100,748.98/138,149.45 = 98,124.58/x
  3. Step 3: Cross multiply
    100,748.98x = 138,149.45 × 98,124.58
  4. Step 4: Simplify right side
    100,748.98x = 13,555,856,758.48
  5. Step 5: Solve for x
    x = 13,555,856,758.48/100,748.98
  6. Step 6: Final answer
    x = 134,550.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.