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Finding the Fourth Proportional to 100,166.80, 138,225.90 and 54,843.96

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Solution

The fourth proportional to 100,166.80, 138,225.90 and 54,843.96 is: 75,682.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,166.80 : 138,225.90 = 54,843.96 : x
  2. Step 2: Convert to fraction form
    100,166.80/138,225.90 = 54,843.96/x
  3. Step 3: Cross multiply
    100,166.80x = 138,225.90 × 54,843.96
  4. Step 4: Simplify right side
    100,166.80x = 7,580,855,730.56
  5. Step 5: Solve for x
    x = 7,580,855,730.56/100,166.80
  6. Step 6: Final answer
    x = 75,682.32

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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.