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Finding the Fourth Proportional to 91,950.72, 137,926.20 and 28,771.20

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Solution

The fourth proportional to 91,950.72, 137,926.20 and 28,771.20 is: 43,156.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,950.72 : 137,926.20 = 28,771.20 : x
  2. Step 2: Convert to fraction form
    91,950.72/137,926.20 = 28,771.20/x
  3. Step 3: Cross multiply
    91,950.72x = 137,926.20 × 28,771.20
  4. Step 4: Simplify right side
    91,950.72x = 3,968,302,285.44
  5. Step 5: Solve for x
    x = 3,968,302,285.44/91,950.72
  6. Step 6: Final answer
    x = 43,156.84

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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.