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Finding the Fourth Proportional to 91,185.99, 125,853 and 54,394.47

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Solution

The fourth proportional to 91,185.99, 125,853 and 54,394.47 is: 75,074.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,185.99 : 125,853 = 54,394.47 : x
  2. Step 2: Convert to fraction form
    91,185.99/125,853 = 54,394.47/x
  3. Step 3: Cross multiply
    91,185.99x = 125,853 × 54,394.47
  4. Step 4: Simplify right side
    91,185.99x = 6,845,707,232.91
  5. Step 5: Solve for x
    x = 6,845,707,232.91/91,185.99
  6. Step 6: Final answer
    x = 75,074.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.