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Finding the Fourth Proportional to 61,245.91, 91,810.54 and 19,663.75

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Solution

The fourth proportional to 61,245.91, 91,810.54 and 19,663.75 is: 29,476.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,245.91 : 91,810.54 = 19,663.75 : x
  2. Step 2: Convert to fraction form
    61,245.91/91,810.54 = 19,663.75/x
  3. Step 3: Cross multiply
    61,245.91x = 91,810.54 × 19,663.75
  4. Step 4: Simplify right side
    61,245.91x = 1,805,339,505.93
  5. Step 5: Solve for x
    x = 1,805,339,505.93/61,245.91
  6. Step 6: Final answer
    x = 29,476.90

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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.