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Finding the Fourth Proportional to 61,274.25, 91,911.42 and 19,721.25

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Solution

The fourth proportional to 61,274.25, 91,911.42 and 19,721.25 is: 29,581.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,274.25 : 91,911.42 = 19,721.25 : x
  2. Step 2: Convert to fraction form
    61,274.25/91,911.42 = 19,721.25/x
  3. Step 3: Cross multiply
    61,274.25x = 91,911.42 × 19,721.25
  4. Step 4: Simplify right side
    61,274.25x = 1,812,608,091.68
  5. Step 5: Solve for x
    x = 1,812,608,091.68/61,274.25
  6. Step 6: Final answer
    x = 29,581.89

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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.