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Finding the Fourth Proportional to 57,693.88, 86,554.78 and 21,670.66

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Solution

The fourth proportional to 57,693.88, 86,554.78 and 21,670.66 is: 32,511.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,693.88 : 86,554.78 = 21,670.66 : x
  2. Step 2: Convert to fraction form
    57,693.88/86,554.78 = 21,670.66/x
  3. Step 3: Cross multiply
    57,693.88x = 86,554.78 × 21,670.66
  4. Step 4: Simplify right side
    57,693.88x = 1,875,699,208.75
  5. Step 5: Solve for x
    x = 1,875,699,208.75/57,693.88
  6. Step 6: Final answer
    x = 32,511.23

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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.