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Finding the Fourth Proportional to 206,431.55, 309,647.80 and 56,673.89

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Solution

The fourth proportional to 206,431.55, 309,647.80 and 56,673.89 is: 85,010.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,431.55 : 309,647.80 = 56,673.89 : x
  2. Step 2: Convert to fraction form
    206,431.55/309,647.80 = 56,673.89/x
  3. Step 3: Cross multiply
    206,431.55x = 309,647.80 × 56,673.89
  4. Step 4: Simplify right side
    206,431.55x = 17,548,943,807.70
  5. Step 5: Solve for x
    x = 17,548,943,807.70/206,431.55
  6. Step 6: Final answer
    x = 85,010.96

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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.