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Finding the Fourth Proportional to 61,293.75, 91,940.63 and 19,740.75

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Solution

The fourth proportional to 61,293.75, 91,940.63 and 19,740.75 is: 29,611.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,293.75 : 91,940.63 = 19,740.75 : x
  2. Step 2: Convert to fraction form
    61,293.75/91,940.63 = 19,740.75/x
  3. Step 3: Cross multiply
    61,293.75x = 91,940.63 × 19,740.75
  4. Step 4: Simplify right side
    61,293.75x = 1,814,976,892.97
  5. Step 5: Solve for x
    x = 1,814,976,892.97/61,293.75
  6. Step 6: Final answer
    x = 29,611.13

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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.