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Finding the Fourth Proportional to 80,910.90, 111,657.08 and 45,100.09

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Solution

The fourth proportional to 80,910.90, 111,657.08 and 45,100.09 is: 62,238.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,910.90 : 111,657.08 = 45,100.09 : x
  2. Step 2: Convert to fraction form
    80,910.90/111,657.08 = 45,100.09/x
  3. Step 3: Cross multiply
    80,910.90x = 111,657.08 × 45,100.09
  4. Step 4: Simplify right side
    80,910.90x = 5,035,744,609.46
  5. Step 5: Solve for x
    x = 5,035,744,609.46/80,910.90
  6. Step 6: Final answer
    x = 62,238.15

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1.5x scale

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.