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Finding the Fourth Proportional to 91,216.55, 136,789.97 and 43,818.14

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Solution

The fourth proportional to 91,216.55, 136,789.97 and 43,818.14 is: 65,710.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,216.55 : 136,789.97 = 43,818.14 : x
  2. Step 2: Convert to fraction form
    91,216.55/136,789.97 = 43,818.14/x
  3. Step 3: Cross multiply
    91,216.55x = 136,789.97 × 43,818.14
  4. Step 4: Simplify right side
    91,216.55x = 5,993,882,178.94
  5. Step 5: Solve for x
    x = 5,993,882,178.94/91,216.55
  6. Step 6: Final answer
    x = 65,710.47

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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.