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Finding the Fourth Proportional to 191,199.21, 286,540.44 and 72,805.96

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Solution

The fourth proportional to 191,199.21, 286,540.44 and 72,805.96 is: 109,110.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,199.21 : 286,540.44 = 72,805.96 : x
  2. Step 2: Convert to fraction form
    191,199.21/286,540.44 = 72,805.96/x
  3. Step 3: Cross multiply
    191,199.21x = 286,540.44 × 72,805.96
  4. Step 4: Simplify right side
    191,199.21x = 20,861,851,813.02
  5. Step 5: Solve for x
    x = 20,861,851,813.02/191,199.21
  6. Step 6: Final answer
    x = 109,110.55

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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.