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Finding the Fourth Proportional to 73,029.81, 100,781.55 and 40,765.89

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Solution

The fourth proportional to 73,029.81, 100,781.55 and 40,765.89 is: 56,257.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,029.81 : 100,781.55 = 40,765.89 : x
  2. Step 2: Convert to fraction form
    73,029.81/100,781.55 = 40,765.89/x
  3. Step 3: Cross multiply
    73,029.81x = 100,781.55 × 40,765.89
  4. Step 4: Simplify right side
    73,029.81x = 4,108,449,581.33
  5. Step 5: Solve for x
    x = 4,108,449,581.33/73,029.81
  6. Step 6: Final answer
    x = 56,257.16

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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.