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Finding the Fourth Proportional to 73,909.86, 110,864.07 and 18,505.86

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Solution

The fourth proportional to 73,909.86, 110,864.07 and 18,505.86 is: 27,758.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,909.86 : 110,864.07 = 18,505.86 : x
  2. Step 2: Convert to fraction form
    73,909.86/110,864.07 = 18,505.86/x
  3. Step 3: Cross multiply
    73,909.86x = 110,864.07 × 18,505.86
  4. Step 4: Simplify right side
    73,909.86x = 2,051,634,958.45
  5. Step 5: Solve for x
    x = 2,051,634,958.45/73,909.86
  6. Step 6: Final answer
    x = 27,758.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.