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Finding the Fourth Proportional to 206,438.59, 309,601.68 and 56,643.37

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Solution

The fourth proportional to 206,438.59, 309,601.68 and 56,643.37 is: 84,949.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,438.59 : 309,601.68 = 56,643.37 : x
  2. Step 2: Convert to fraction form
    206,438.59/309,601.68 = 56,643.37/x
  3. Step 3: Cross multiply
    206,438.59x = 309,601.68 × 56,643.37
  4. Step 4: Simplify right side
    206,438.59x = 17,536,881,526.44
  5. Step 5: Solve for x
    x = 17,536,881,526.44/206,438.59
  6. Step 6: Final answer
    x = 84,949.63

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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.