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Finding the Fourth Proportional to 205,890.30, 308,858.49 and 65,617.02

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Solution

The fourth proportional to 205,890.30, 308,858.49 and 65,617.02 is: 98,432.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,890.30 : 308,858.49 = 65,617.02 : x
  2. Step 2: Convert to fraction form
    205,890.30/308,858.49 = 65,617.02/x
  3. Step 3: Cross multiply
    205,890.30x = 308,858.49 × 65,617.02
  4. Step 4: Simplify right side
    205,890.30x = 20,266,373,715.50
  5. Step 5: Solve for x
    x = 20,266,373,715.50/205,890.30
  6. Step 6: Final answer
    x = 98,432.87

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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.