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Finding the Fourth Proportional to 91,291.80, 136,850.22 and 38,628.84

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Solution

The fourth proportional to 91,291.80, 136,850.22 and 38,628.84 is: 57,906.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,291.80 : 136,850.22 = 38,628.84 : x
  2. Step 2: Convert to fraction form
    91,291.80/136,850.22 = 38,628.84/x
  3. Step 3: Cross multiply
    91,291.80x = 136,850.22 × 38,628.84
  4. Step 4: Simplify right side
    91,291.80x = 5,286,365,252.34
  5. Step 5: Solve for x
    x = 5,286,365,252.34/91,291.80
  6. Step 6: Final answer
    x = 57,906.24

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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.