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Finding the Fourth Proportional to 61,293.84, 91,933.91 and 21,305.91

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Solution

The fourth proportional to 61,293.84, 91,933.91 and 21,305.91 is: 31,956.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,293.84 : 91,933.91 = 21,305.91 : x
  2. Step 2: Convert to fraction form
    61,293.84/91,933.91 = 21,305.91/x
  3. Step 3: Cross multiply
    61,293.84x = 91,933.91 × 21,305.91
  4. Step 4: Simplify right side
    61,293.84x = 1,958,735,612.41
  5. Step 5: Solve for x
    x = 1,958,735,612.41/61,293.84
  6. Step 6: Final answer
    x = 31,956.48

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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.