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Finding the Fourth Proportional to 91,231.67, 136,860.62 and 28,057.12

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Solution

The fourth proportional to 91,231.67, 136,860.62 and 28,057.12 is: 42,089.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,231.67 : 136,860.62 = 28,057.12 : x
  2. Step 2: Convert to fraction form
    91,231.67/136,860.62 = 28,057.12/x
  3. Step 3: Cross multiply
    91,231.67x = 136,860.62 × 28,057.12
  4. Step 4: Simplify right side
    91,231.67x = 3,839,914,356.18
  5. Step 5: Solve for x
    x = 3,839,914,356.18/91,231.67
  6. Step 6: Final answer
    x = 42,089.71

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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.