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Finding the Fourth Proportional to 99,791.82, 149,687.46 and 40,613.50

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Solution

The fourth proportional to 99,791.82, 149,687.46 and 40,613.50 is: 60,920.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,791.82 : 149,687.46 = 40,613.50 : x
  2. Step 2: Convert to fraction form
    99,791.82/149,687.46 = 40,613.50/x
  3. Step 3: Cross multiply
    99,791.82x = 149,687.46 × 40,613.50
  4. Step 4: Simplify right side
    99,791.82x = 6,079,331,656.71
  5. Step 5: Solve for x
    x = 6,079,331,656.71/99,791.82
  6. Step 6: Final answer
    x = 60,920.14

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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.