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Finding the Fourth Proportional to 72,987.11, 100,719.15 and 41,158.97

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Solution

The fourth proportional to 72,987.11, 100,719.15 and 41,158.97 is: 56,797.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,987.11 : 100,719.15 = 41,158.97 : x
  2. Step 2: Convert to fraction form
    72,987.11/100,719.15 = 41,158.97/x
  3. Step 3: Cross multiply
    72,987.11x = 100,719.15 × 41,158.97
  4. Step 4: Simplify right side
    72,987.11x = 4,145,496,473.28
  5. Step 5: Solve for x
    x = 4,145,496,473.28/72,987.11
  6. Step 6: Final answer
    x = 56,797.65

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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.