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Finding the Fourth Proportional to 72,613.80, 100,231.56 and 45,801

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Solution

The fourth proportional to 72,613.80, 100,231.56 and 45,801 is: 63,220.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,613.80 : 100,231.56 = 45,801 : x
  2. Step 2: Convert to fraction form
    72,613.80/100,231.56 = 45,801/x
  3. Step 3: Cross multiply
    72,613.80x = 100,231.56 × 45,801
  4. Step 4: Simplify right side
    72,613.80x = 4,590,705,679.56
  5. Step 5: Solve for x
    x = 4,590,705,679.56/72,613.80
  6. Step 6: Final answer
    x = 63,220.84

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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.