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Finding the Fourth Proportional to 65,727, 90,696.76 and 40,240.55

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Solution

The fourth proportional to 65,727, 90,696.76 and 40,240.55 is: 55,527.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,727 : 90,696.76 = 40,240.55 : x
  2. Step 2: Convert to fraction form
    65,727/90,696.76 = 40,240.55/x
  3. Step 3: Cross multiply
    65,727x = 90,696.76 × 40,240.55
  4. Step 4: Simplify right side
    65,727x = 3,649,687,505.62
  5. Step 5: Solve for x
    x = 3,649,687,505.62/65,727
  6. Step 6: Final answer
    x = 55,527.98

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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.