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Finding the Fourth Proportional to 243,561.90, 365,278.05 and 75,081.90

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Solution

The fourth proportional to 243,561.90, 365,278.05 and 75,081.90 is: 112,602.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,561.90 : 365,278.05 = 75,081.90 : x
  2. Step 2: Convert to fraction form
    243,561.90/365,278.05 = 75,081.90/x
  3. Step 3: Cross multiply
    243,561.90x = 365,278.05 × 75,081.90
  4. Step 4: Simplify right side
    243,561.90x = 27,425,770,022.30
  5. Step 5: Solve for x
    x = 27,425,770,022.30/243,561.90
  6. Step 6: Final answer
    x = 112,602.87

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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.